Alien & UFO FAQ: Every Question, Answered

The debris was found on the Foster ranch near Corona, New Mexico, roughly 75 miles northwest of Roswell, by ranch foreman W. W. "Mac" Brazel. The story is named for Roswell because the Roswell Army Air Field issued the July 8, 1947 press release about a recovered "flying disc," and its officers collected the material.

The U.S. Air Force's position, set out in reports in 1994 and 1997, is that the debris came from a Project Mogul balloon train, a classified array of balloons and radar reflectors flown to listen for Soviet nuclear tests, and that later "body" stories reflect anthropomorphic test dummies dropped in the 1950s. Ufologists argue witnesses described material and a cover-up that a balloon cannot explain. No physical evidence of a craft has ever been produced.

William Ware "Mac" Brazel was the foreman of the Foster ranch who found the debris field in the summer of 1947 and reported it to Chaves County Sheriff George Wilcox, who called the air base. He was interviewed by the military and gave one press interview; his family later said the experience made him reluctant to discuss it again.

The July 4 date comes from later reconstructions by researchers and witnesses, not from 1947 records. The documented dates are Brazel's report to the sheriff around July 6–7 and the air base's press release on July 8, followed by the weather-balloon retraction the same day.

On the evening of Thursday, March 13, 1997, between roughly 7:30 and 10:30 p.m. local time, with reports stretching from southern Nevada across Arizona to the Phoenix area and beyond.

There were two events that night. The first was a V-shaped formation of lights seen moving across the state around 8:15–8:45 p.m., which the Air Force attributed to aircraft flying in formation; witnesses describe a single enormous silent craft. The second, around 10 p.m., was a row of lights over the city that were identified as illumination flares dropped by A-10 aircraft of the Maryland Air National Guard over the Barry M. Goldwater Range.

Yes. In 1997 he held a press conference mocking the story with an aide in an alien costume; in 2007 he said he had personally seen a large, silent craft that night and had joked to defuse public alarm.

1997. The event is sometimes confused with later Arizona sightings, including a 2008 series of lights over Phoenix that was traced to flares tied to helium balloons.

Over the nights of December 26–28, 1980, U.S. Air Force personnel from the twin bases of RAF Woodbridge and RAF Bentwaters in Suffolk reported lights and a landed or hovering object in the forest between them. Airmen John Burroughs and Jim Penniston approached it on the first night; deputy base commander Lt. Col. Charles Halt led a patrol on the third and recorded his observations on tape.

A U.S. Air Force security policeman who was among the first to approach the lights on December 26, 1980. He later attributed lasting health problems to the encounter and, in 2015, became the first person granted U.S. veterans' benefits for injuries connected to a UFO incident, a decision that itself attracted attention to the case.

Because it combines the ingredients Roswell has: multiple military witnesses, an official document (the Halt memo), physical traces measured at the site, and decades of dispute. It is the most thoroughly documented UFO case in the United Kingdom.

A one-page memorandum titled "Unexplained Lights," written by Lt. Col. Charles Halt on January 13, 1981 to the British Ministry of Defence, summarizing the sightings and the radiation readings his patrol took. It was released under the U.S. Freedom of Information Act in 1983 and is the core document of the case.

A former U.S. Air Force Security Police airman who says that in 1977, while guarding Minuteman missile sites at Ellsworth Air Force Base in South Dakota, he and his partner encountered a huge glowing craft and small grey beings, lost time, and were changed by it. He has told the story publicly for years, most prominently in interviews with Jesse Michels.

According to Woods, he and Michael Johnson responded to a missile site, saw an enormous object overhead, encountered grey beings, and next remember being elsewhere with time missing. No official Air Force record of the event has been made public.

Woods' partner on the night of the encounter and the second witness. He did not speak publicly until August 2026, when Jesse Michels' team located him and released a video interview.

Not publicly. The case currently rests on the two men's accounts. Base incident reports and medical records from the period, if they exist and can be obtained, would be the next evidence to look for.

Small spherical or point-like objects, often glowing or metallic, that people report moving in un-aircraft-like ways. The Pentagon's AARO office says metallic spheres are the most common shape in its reports; the public uses the word for almost any unidentified light.

Drone footage screened at a September 2025 House hearing appears to show a Hellfire missile striking a spherical object off Yemen, after which the object continues apparently intact. No official explanation has been published.

No. Federal agencies attributed the late-2024 sightings to lawful drones, manned aircraft, helicopters, and stars, and the White House later said many drones were FAA-authorized. Most viral clips were aircraft, planets, or satellites.

Flash photographs turn dust, pollen, or water droplets near the lens into translucent circles. Those are optical artifacts, not objects in the sky.

In the United States, to the National UFO Reporting Center (nuforc.org) or MUFON (mufon.com); both take online reports. In the UK, to BUFORA; in France, to the space agency's GEIPAN; in Canada, to Ufology Research or MUFON Canada. Contact police only if there is a safety concern.

No. NASA has no public reporting channel. The FAA's Aeronautical Information Manual now points anyone wanting to report UAP to the website of the Pentagon's AARO, but AARO accepts reports only from current and former government employees and contractors, not the general public. A civilian sighting still goes to NUFORC or MUFON.

Not individual public sightings. AARO analyzes military and government reports; civilian reports are collected and, in MUFON's case, investigated by volunteers. France's GEIPAN is the only government body that investigates and publishes public reports.

Keep the original file untouched, note the exact time, location, and direction, and check satellite, aircraft, and planet positions for that moment before reporting. Send the original, not a re-encoded copy, to whichever center you report to.

He saw an unidentified object pacing the spacecraft on the way to the Moon, which the crew concluded was one of the four SLA panels that had enclosed the lunar module and separated from the rocket. Aldrin has explained this on television many times and has never claimed it was alien. The "lie detector" story of 2018 was a voice analysis of an old interview and proved nothing.

Gordon Cooper reported saucers as a fighter pilot in Germany in 1951 and a filmed landing at Edwards in 1957; James McDivitt photographed an unidentified object from Gemini 4 in 1965; Frank Borman reported a "bogey" from Gemini 7; Story Musgrave saw a snake-like object on STS-80; Leroy Chiao saw lights from the ISS. Most of them offered ordinary explanations. Edgar Mitchell believed in alien visits but never saw one.

No, by his own account. The story of a green object approaching his Mercury capsule in 1963 was denied by Cooper throughout his life. His UFO reports concern 1951 in Germany and 1957 at Edwards Air Force Base, before he became an astronaut.

The station's cameras have recorded many unidentified lights and objects, and crews and analysts have identified them as ice, paint flakes, thermal-blanket debris, boosters, satellites, lens flares and city or boat lights. The live feed "cutting away" during sightings is the routine handoff between ground stations.

No. The Apollo 14 astronaut said repeatedly that aliens had visited Earth and that Roswell was covered up, but he was equally clear that he had never seen anything himself. His belief came from people he trusted, including sources in Roswell, where he grew up.

Unexplained aerial sightings appear in ancient and medieval records, the 1561 Nuremberg broadsheet being the best known, and the 1896–97 airship wave was the first modern-style flap. The UFO era proper began on June 24, 1947, with Kenneth Arnold's sighting near Mount Rainier, which produced the phrase "flying saucer" and hundreds of reports within weeks.

Captain Edward J. Ruppelt, the first head of Project Blue Book, introduced "unidentified flying object" in the early 1950s as a neutral replacement for "flying saucer." It was in general use by 1953 and became a synonym for alien spacecraft almost immediately.

There is no single first. The earliest well-documented printed account is the Nuremberg broadsheet of April 1561; the first sighting of the modern era, and the one that named the phenomenon, was Kenneth Arnold's on June 24, 1947.

To shed the stigma. "UFO" had come to mean "alien spaceship," so the British Ministry of Defence and later the U.S. military adopted "unidentified aerial phenomena." In late 2022 Congress changed the term to "unidentified anomalous phenomena" to include objects under water and in space.

The National UFO Reporting Center has received several thousand reports a year for most of the last two decades, peaking in the early 2010s and rising again since 2019 with Starlink and renewed attention. Alien Tavern's sightings trends page follows how the reports have risen and fallen and what the spikes line up with.

Not the one the newspapers described. Audience surveys that night put the Mercury Theatre's share at about two percent of listeners, most of the country was tuned to a ventriloquist on NBC, and there is no record of a death, a suicide or a stampede caused by the program. Some listeners were frightened and some telephoned police and papers, which is where the next morning's headlines came from; later researchers found the panic story was largely the press reporting on itself.

Grover's Mill, New Jersey, a real hamlet near Princeton that the writer Howard Koch picked by closing his eyes and dropping a pencil on a road map. The script then moved the invasion through Trenton and Newark to Manhattan, which is why the New York papers took it personally. A monument to the landing stands in Grover's Mill today.

No. CBS and the Federal Communications Commission reviewed complaints and took no action; Welles apologized at a press conference the next morning, which was filmed, and was a national celebrity by the end of the week. The broadcast led to his Hollywood contract and, three years later, Citizen Kane. Radio networks agreed among themselves not to use fake news bulletins in drama, and mostly kept to it.

An anti-aircraft barrage fired over Los Angeles in the early hours of February 25, 1942, at unidentified targets that were never found. About 1,400 shells were fired, no enemy aircraft was hit, and five civilians died in the blackout and falling shrapnel.

There is no evidence it was. The Air Force's 1983 historical review concluded a lost weather balloon in the searchlights most likely triggered the shooting, with smoke and shell bursts sustaining it. The famous photograph was retouched for print and cannot settle the question either way.

Not by air. A Japanese submarine shelled the Ellwood oil field near Santa Barbara on February 23, 1942, which is why the city was on alert, but Japan flew no aircraft over Los Angeles that night.

Unidentified balls of light that Allied and Axis aircrews reported following their aircraft, mostly at night over Europe and the Pacific, from late 1944 to the end of the war. They never attacked and never appeared on radar.

From the Smokey Stover comic strip's catchphrase "where there's foo, there's fire," applied by a radar operator of the U.S. 415th Night Fighter Squadron in 1944. The band took its name from the phenomenon fifty years later.

Not definitively. The leading candidates are St. Elmo's fire and ball lightning, with reflections and fatigue explaining some reports. German secret weapons were ruled out after the war.

Nine bright, thin objects flying in formation near Mount Rainier, Washington, on June 24, 1947, at a speed he calculated at over 1,700 mph. He described their motion as skipping like a saucer on water.

Newspaper headlines, not Arnold. He said the objects moved like a skipped saucer; reporters turned that into "flying saucers," and the phrase defined the shape of UFOs for decades.

Not to general agreement. Proposals include a mirage, ice crystals, a flock of pelicans, and a fireball. Arnold rejected them all, and the case remains the accepted starting point of the modern UFO era.

On January 7, 1948, he climbed his P-51 above 20,000 feet without oxygen while chasing a large bright object over Kentucky, blacked out, and crashed near Franklin, Kentucky. He was killed instantly.

Almost certainly a Navy Project Skyhook research balloon, a classified hundred-foot polyethylene balloon flying above 60,000 feet, which would have looked like a huge metallic object he could never reach. The Air Force's first explanation, the planet Venus, did not fit.

Formations of fast, silent, bluish-green lights seen repeatedly over Lubbock, Texas, from late August 1951, first by three Texas Tech professors and then by many residents, and photographed by student Carl Hart Jr.

That the professors most likely saw plovers reflecting the city's new mercury-vapor streetlights. The Carl Hart photographs were never explained.

On the weekends of July 19–20 and 26–27, radar at Washington National Airport and Andrews AFB tracked unidentified objects over the capital, pilots reported lights, and Air Force jets were scrambled without intercepting anything.

Temperature inversions producing false radar returns, plus stars and meteors for the visual sightings, as announced by Major General John Samford at a Pentagon press conference on July 29, 1952.

A CIA-convened panel of scientists in January 1953, prompted by the Washington flap, that recommended debunking UFO reports and reducing public interest so that reports could not swamp military channels during a real attack.

On August 21, 1955, members of the Sutton family said small glowing creatures with large ears and eyes surrounded their farmhouse near Hopkinsville for hours, unharmed by shotgun fire. Police found no evidence of the creatures.

The leading one is great horned owls, aggressive near a nest and easily magnified in the dark. No physical evidence supports the creatures and no hoax was ever proven; the family stood by the story.

It is the case that spread the phrase in the American press in 1955, even though the witnesses described silver, not green, beings.

On the night of November 2–3, 1957, more than a dozen drivers near Levelland reported a large glowing object on or over the road that stalled their engines and headlights as it approached and let them restart when it left.

Ball lightning or wet-weather electrical effects, after a one-day investigation. Witnesses said the weather was misty rather than stormy, and Blue Book's own consultant J. Allen Hynek later called the inquiry inadequate.

On April 24, 1964, he reported an egg-shaped craft on legs in a desert gully with two small figures in white beside it. It flew off with a roar and flame, leaving four landing impressions and burning brush.

No. After ruling out helicopters, test vehicles, balloons, and hoax, the Air Force filed it as unidentified, and its consultant J. Allen Hynek regarded it as one of the strongest cases on record.

A 1968 letter from the president of New Mexico Tech claimed students staged it, but no participant, method, or evidence has ever surfaced. The claim is unproven either way.

Officially, nothing: the Air Force said a search found no object after a fireball crossed the region on December 9, 1965. Witnesses describe an acorn-shaped object with markings and a military recovery. The Soviet probe Kosmos 96 has been proposed, but its recorded re-entry does not fit the time or place.

Because it has the same shape as the Roswell story: a crash, military personnel sealing the site, an object removed on a truck, an official denial, and decades of witnesses. A replica of the reported object stands in the town.

On April 6, 1966, around two hundred students and staff at Westall High School in Melbourne watched a silver saucer-shaped object descend behind trees near the school and fly off minutes later. Witnesses say they were told not to talk about it.

The strongest natural candidate is a HIBAL radiation-sampling balloon that went off course, proposed by researcher Keith Basterfield in 2014. Witnesses dispute it, and no official record of the event has surfaced.

On March 16, 1967, all ten missiles of Echo Flight went off alert nearly simultaneously, an event recorded in the wing's history. Former launch officer Robert Salas says a glowing object was reported over a launch control facility as his missiles at Oscar Flight also went down.

The shutdown is documented; the UFO connection rests on witness testimony and is disputed. Boeing reproduced an electrical-noise cause for the failure without identifying its source, and researchers disagree over whether the records support Salas's account.

On October 4, 1967, witnesses saw a lighted object hit the water off Shag Harbour, Nova Scotia; RCMP officers saw a light on the surface before it sank, boats found a foam slick and no wreckage, and navy divers found nothing. Canadian records list the case as an unsolved UFO.

Because it is the country's most documented UFO case and the government never explained it. Unlike Roswell, the official file records only an unidentified object and a fruitless search, with no crash-retrieval claim.

On May 20, 1967, he said a landed disc vented hot gas that burned a grid pattern onto his chest and abdomen as he approached it near Falcon Lake, Manitoba. The burns were photographed and examined by doctors.

No. The RCMP, the RCAF, and the U.S. Condon Committee investigated and found neither a hoax nor an explanation. Canada issued a commemorative coin for the case in 2018.

Two Iranian Air Force F-4 Phantoms were scrambled after a bright object over Tehran on the night of September 18–19, 1976. Both reported instrument and communications failures as they approached; one crew got a radar lock and lost its weapons system when a smaller object came at them.

Yes. A Defense Intelligence Agency report distributed to the White House, CIA, and NSA and declassified in 1978 called it a classic case meeting every criterion for serious study.

He vanished with his Cessna over Bass Strait, Australia, on October 21, 1978, minutes after radioing that an unidentified object with bright lights was hovering over him. No confirmed wreckage or body has been found.

Spatial disorientation at dusk over water, possibly flying inverted and mistaking the reflection of his own lights for an object, on a night when four bright planets were in the western sky. The official inquiry left the cause undetermined.

On December 29, 1980, near Huffman, Texas, Betty Cash, Vickie Landrum, and Landrum's grandson saw a large diamond-shaped object venting flame over the road, followed by a formation of military-type helicopters. All three fell ill afterward with radiation-like symptoms.

No. Their $20 million claim against the U.S. government was dismissed in 1986 after the military stated it owned no such craft and had no helicopters in the area that night.

A photograph taken by two hikers near Calvine, Scotland, on August 4, 1990, showing a large diamond-shaped object and a military jet. The Ministry of Defence held the pictures for 32 years; one print was published in 2022.

The print is genuine and unretouched, but what it shows is disputed. Explanations include a reflection of a rock or island in water with the image inverted, or a model hung near the camera. The photographers have never come forward.

On September 16, 1994, sixty-two pupils at Ariel School in Ruwa, Zimbabwe, said a silver craft landed near the playground and small large-eyed beings appeared beside it. The children drew what they saw and were interviewed by researcher Cynthia Hind and psychiatrist John Mack.

Not conclusively. Skeptics point to a widely reported rocket re-entry fireball two days earlier and to suggestion during interviews. The witnesses, now adults, maintain the account, as shown in the 2022 documentary Ariel Phenomenon.

On January 20, 1996, three young women reported seeing a strange brown creature with red eyes in a vacant lot, and in the following days the city filled with stories of creatures captured by the military and taken to a hospital. The Brazilian Army said the "creature" was a disabled local man.

Because it has the same shape: rumors of a recovered non-human being, military vehicles in town, an official mundane explanation, and witnesses who have told the same story for decades, most recently in the 2022 documentary Moment of Contact.

On November 7, 2006, at least a dozen United Airlines employees watched a dark disc hover over Gate C17 for several minutes and then shoot up through the cloud deck, leaving a hole. The FAA called it a weather phenomenon; nothing appeared on radar.

No verified photograph or video has ever surfaced, despite the number of witnesses and the setting. The case rests on consistent employee accounts and FAA records obtained under FOIA.

A Chinese surveillance balloon, downed off South Carolina on February 4, and three smaller unidentified objects over Alaska, the Yukon, and Lake Huron on February 10–12, assessed as most likely private, recreational, or research balloons. None of the three was recovered.

No. The White House said there was no indication of extraterrestrial activity, and the surge in detections followed NORAD loosening radar filters after the Chinese balloon. A hobby club's missing pico balloon matched the Yukon shootdown.

The Greys are the archetypal alien of modern ufology: small (typically described as three to four feet tall), hairless, grey-skinned beings with oversized heads, large black almond-shaped eyes, and slit-like mouths. The image took hold after the 1961 Betty and Barney Hill case and became universal with Whitley Strieber's Communion cover in 1987.

The literature describes several: short Greys around three to four feet tall, said to do the physical work in abduction accounts; taller Greys of six to seven feet, described as leaders or doctors; and regional variants with differences in skin tone or eye shape. These distinctions come from witness reports and channelled sources, not from any physical specimen.

Accounts disagree. Abduction narratives usually describe Greys as clinical and indifferent rather than malicious, conducting examinations without apparent concern for the person. Contactee and channelling traditions describe them as benevolent or as servants of other species. Since no verified encounter exists, the question is really about which stories you weigh.

There is no physical evidence for them. Psychologists point to sleep paralysis, hypnagogic imagery, and the way a widely shared cultural image shapes what people report, and the spread of the Grey template tracks its appearances in media closely. Believers point to the consistency of thousands of accounts. The honest answer is that they are real as an experience for many people and unproven as a species.

Zeta Reticuli, a binary star system about 39 light-years away. The link comes from Betty Hill's "star map," drawn under hypnosis, which schoolteacher Marjorie Fish matched to Zeta Reticuli in the 1970s. Later star-catalog data weakened the match, and Bob Lazar's 1989 claims about craft from the same system kept the name in circulation.

Contactee accounts usually put them at six to seven feet, with some reports of beings approaching eight feet. Their height, along with fair skin and long blond hair, is what distinguishes the type from the small Greys in the same literature.

Human in every respect but idealized: tall, athletic, pale, with long blond hair and blue or light eyes, often described as serene or radiant. The template dates to the 1950s contactees, above all George Adamski's "Orthon," and has barely changed since.

They overlap. "Pleiadians" is the name Swiss contactee Billy Meier gave in the 1970s to Nordic-type beings he said came from the Pleiades star cluster, and New Age channelling adopted it. In practice most descriptions of Pleiadians are descriptions of Nordics with a home address attached.

No authenticated photographs exist. The best-known images, Meier's, have been widely analyzed and are generally regarded as models and doubles. Every other "Nordic alien photo" in circulation is unsourced, staged, or artwork.

Science has confirmed none. Ufology, drawing on decades of witness and contactee reports, commonly describes four or five recurring archetypes: the Greys, the Nordics (or Pleiadians), the Reptilians, and the insectoid Mantis beings, with the Tall Whites and various hybrids sometimes listed as well.

The four types that appear most often across encounter accounts are Greys, Nordics, Reptilians, and Mantids. The list is a summary of what people report, not a taxonomy anyone has verified.

The Greys, by a wide margin. They dominate abduction reports from the 1960s onward and became the default image of an alien in film and television, which in turn shapes what witnesses expect and describe.

No. No physical evidence of any extraterrestrial being has been produced and verified. Every type on this page is known only through testimony, channelled material, and popular culture.

A former U.S. Air Force weather observer who served at the Nellis Air Force Range near Indian Springs, Nevada, in the mid-1960s. In the Millennial Hospitality book series, published from 2002 onward, he describes extended contact there with beings he calls the Tall Whites and with the military personnel who managed it.

His military service is real and he presents the books as memoir rather than fiction. Nothing in them has been independently corroborated: no other named witness has come forward, and no documentation of the beings or the arrangement he describes exists. Readers tend to find him sincere; sincerity is not evidence.

Hall describes adults of around six feet and elders reaching eight or nine feet, with chalk-white skin, large blue eyes, and fragile bodies, living far longer than humans.

No, though both are tall and pale humanoids. Nordics come from 1950s contactee reports and are described as idealized humans; the Tall Whites come from Hall's accounts alone and are described as visibly non-human, with distinctive proportions and skin. The two are usually kept separate in the literature.

On U.S. Route 3 through Franconia Notch in New Hampshire's White Mountains, near the Indian Head rock formation, on the night of September 19–20, 1961, as the couple drove home to Portsmouth from Niagara Falls. A state historical marker commemorating the case stands in Lincoln, New Hampshire.

The couple noticed shiny spots on the trunk of their 1957 Chevrolet Bel Air after the trip; Betty reported that a compass needle spun when held near them. The car and its stains were never scientifically examined at the time, and no physical evidence from it survives.

It was the first to be widely publicized in the United States, through a 1965 Boston newspaper series, John Fuller's 1966 book The Interrupted Journey, and a 1975 television film. An earlier claim, Brazilian farmer Antonio Vilas-Boas's 1957 account, predates it but was not published in English until later.

Under hypnosis in 1964, Betty drew a pattern of stars she said she had been shown aboard the craft. Between 1968 and 1973, Ohio schoolteacher and amateur astronomer Marjorie Fish built three-dimensional models and matched the pattern to stars around Zeta Reticuli, which is how that system entered UFO lore. Later, more accurate star-distance data undermined the match, and the map remains disputed.

George Adamski, by common agreement, though people had reported meeting beings from other worlds before him. His November 1952 account of a conversation with a Venusian in the California desert was the first to reach a mass audience, through the 1953 book Flying Saucers Have Landed, and it set the pattern every contactee of the 1950s followed: a friendly, human-looking visitor, a warning about atomic war, and a message to pass on.

That on November 20, 1952, near Desert Center, California, a bell-shaped scout craft landed and a man with long blond hair in a one-piece brown suit walked toward him, communicated by gestures and telepathy that he came from Venus in peace and in concern about radiation from atomic tests, and left footprints with symbols in the soles. Six companions watching from a distance signed an affidavit that they had seen the craft and the figure.

No investigator outside his circle has ever accepted them. The best-known, taken on December 13, 1952, shows a bell-shaped craft with three spheres beneath it; skeptics identified the shape as a lamp shade, a chicken brooder or the top of a canister vacuum cleaner, and a model matching it was later shown to produce the same picture. Adamski maintained they were genuine until his death in 1965.

Bedroom visitations, roadside or vehicle encounters, missing-time cases, medical-examination and hybrid-program narratives, benevolent contact-style experiences, military "MILAB" claims, and lifelong experiencer accounts. Most reports combine more than one.

A "military abduction": an experiencer's claim that human military personnel, alone or alongside aliens, abducted or interrogated them. No such program has ever been documented.

An ordinary memory, often of an owl, deer, or doctor, that an experiencer later believes was a disguise laid over an alien encounter. It is a common feature of lifelong-experiencer accounts and a disputed one.

A Brazilian farmer who said that in October 1957, aged 23, he was taken aboard a landed craft while plowing at night, examined, and made to have sex with a female being. He later became a lawyer and never changed his account.

It is the first detailed modern abduction account on record, predating the Betty and Barney Hill case of 1961, though it was not published in English until 1965.

The U.S. Air Force's official investigation of UFO reports from 1952 to 1969, successor to Project Sign (1948) and Project Grudge (1949). Its files record 12,618 sightings, of which 701 remained "unidentified" when it closed. Astronomer J. Allen Hynek served as its scientific consultant.

Yes. It was a real Air Force program whose records are held by the U.S. National Archives. The 2019–2020 History Channel drama of the same name used real cases and people as a starting point but invented most of its plots.

The project was terminated on December 17, 1969, following the University of Colorado's Condon Report. Its case files were declassified and transferred to the National Archives in the mid-1970s, with witnesses' personal names redacted, and have been available on microfilm and, more recently, online since then.

At the U.S. National Archives (Record Group 341), through its online catalog, and via third-party digitizations that mirror the same microfilm. The files include the original sighting reports, correspondence, and the investigators' conclusions for each case.

No. Its closing conclusions were that no UFO had ever threatened national security, that none represented technology beyond current science, and that none was extraterrestrial. Hynek himself later argued the investigation had been designed to explain cases away rather than to study them.

A former U.S. intelligence analyst who says he worked in the Department of Defense and who identified himself in 2025 as the author of the Immaculate Constellation report. He has since given interviews with Jeremy Corbell, George Knapp, and Jesse Michels and asked for immunity in August 2026 to say more.

The name of an alleged unacknowledged special access program described in a roughly twelve-page document that reached Congress and journalists in 2024. The document says the program compartmentalizes UAP imagery and incident data. The Pentagon has not acknowledged it.

It has not been confirmed. Brown declined to expand the initialism when Jesse Michels asked him in August 2026, and no document or official has confirmed a meaning. Online expansions are guesses.

No. The Department of Defense has not confirmed the program, the document, or the "legacy program" agreements he described. Congress has heard from him and other witnesses but has not released corroborating records.

No. The archaeological record for human construction is unusually complete: the workers' town and cemeteries at Giza, the quarries and tool marks, the ramp remains, and the Diary of Merer, a papyrus logbook found at Wadi al-Jarf in 2013 that records limestone shipments to Giza during Khufu's reign.

With copper tools and dolerite pounders to cut limestone and granite, sledges pulled over wetted sand to move the blocks, ramps to raise them, and a workforce of tens of thousands of paid, fed laborers organized in crews, working over roughly twenty years for the Great Pyramid. Recent excavations have found their bakeries, breweries, and infirmaries.

Because of their scale, the precision of their alignment to the cardinal points, and the belief that Bronze Age people could not have managed either. The idea was popularized by Erich von Däniken's 1968 book Chariots of the Gods? and by the Ancient Aliens television series. The alignment was achieved with stellar observation; the scale with organization.

The Egyptians of the Fourth Dynasty, under Pharaoh Khufu, around 2560 BC, with the project overseen by his vizier Hemiunu. Khufu's name appears in workers' graffiti inside the monument's relieving chambers.

Hundreds of geoglyphs, from straight lines and geometric shapes to animal and plant figures, drawn on the desert plateau of southern Peru by the Nazca culture between roughly 500 BC and AD 500. They were made by removing the dark, iron-oxide-coated stones from the surface to expose the pale ground beneath, and they survive because the region is almost rainless.

The leading explanations are ritual: pathways walked in ceremonies, offerings connected to water and fertility in a desert, and figures meant to be seen by the gods. A 2024 survey by Yamagata University, using AI to scan aerial imagery, found 303 new figures and showed many cluster along pilgrimage trails. Astronomical calendar theories have found less support.

Partly. The straight lines and some figures are visible from the surrounding hills, and researchers have reproduced figures using simple stakes and cords without any aerial view. The desert surface is soft, which is one reason the "runway" idea fails: nothing could land on it.

No evidence supports that. The technique is simple, the figures match motifs on Nazca pottery and textiles, and the culture's settlements, burials, and aqueducts surround the site. The alien idea comes from the 1968 book Chariots of the Gods?, which called the lines landing strips.

Radiocarbon dating of organic material in the lowest layer of the site's mound, led by archaeologist Alexei Vranich, places construction in roughly AD 536–600 by the Tiwanaku culture. Much older dates sometimes quoted online descend from Arthur Posnansky's early-twentieth-century astronomical estimate of about 15,000 BC, which modern archaeology rejects.

With stone tools, sand and water for abrasion, and, above all, standardized design. The andesite and red sandstone were quarried from sites 10 to 90 kilometers away, shaped to repeating modular measurements, and assembled with I-shaped metal clamps poured in place. The precision reflects templates and skill, not machinery.

Interlocking andesite blocks cut to near-identical proportions, which suggests the builders worked from a template and mass-produced components, like a kit of parts. They are the site's most photographed feature and the centerpiece of "impossible precision" claims.

There is no evidence for it. Every "impossible" feature has a documented human explanation, and the site's carbon dates and cultural context tie it firmly to the Tiwanaku, whose other monuments show the same techniques developing over centuries.

Not as such; the concept did not exist. Ancient-astronaut writers read several passages as descriptions of craft, above all Ezekiel's wheeled vision, the pillar of cloud and fire in Exodus, and Elijah's chariot of fire. Biblical scholars read the same passages as standard ancient Near Eastern imagery for the presence of God.

In Ezekiel 1, four winged creatures each accompanied by a wheel "in the middle of a wheel," whose rims were full of eyes, carry a throne on a crystal expanse. NASA engineer Josef Blumrich argued in 1974 that it described a landing craft with rotor units. Scholars identify it as the wheeled throne-chariot of God, drawing on Babylonian and Assyrian throne imagery, and it became the basis of Jewish merkabah mysticism.

Genesis 6 calls them the offspring of the "sons of God" and human women, "the mighty men of old." The Book of Enoch expands the story into fallen angels called Watchers who fathered giants. Ancient-astronaut writers identify them as alien-human hybrids; scholars read a fragment of older myth used to explain legendary giants and set up the Flood.

It has no doctrine against them. The Vatican Observatory studies astrobiology, its director has said he would baptize an alien, and Pope Francis said in 2014 he would baptize Martians who asked. The Church rejects the claim that the God of the Bible was an extraterrestrial, not the possibility of life elsewhere.

The UFO reading rests on the star "going before" the Magi and "standing over" a house, which stars do not do. Astronomers have proposed planetary conjunctions in 7–6 BCE, a nova or a comet, and many scholars think Matthew composed the star as a fulfillment of prophecy rather than recording an observation. No reading requires a craft.

Physicist Enrico Fermi, who in a 1950 lunchtime conversation at Los Alamos with Edward Teller, Emil Konopinski, and Herbert York reportedly asked, "Where is everybody?" The argument was formalized in Michael Hart's 1975 paper on the absence of extraterrestrials, and the name "Fermi paradox" came into common use after that.

The conversation was in the summer of 1950; the first rigorous statement of the problem was Hart's 1975 paper; and the Great Filter framing was added by Robin Hanson in 1996. The idea dates to 1950 and the debate has never settled.

There is no consensus. The candidates that get the most support from scientists are the mundane ones: intelligent life is rare, interstellar distances make contact and colonization impractical, and we have barely begun to look. The dramatic solutions, a Great Filter ahead of us or a galaxy that hides, cannot be ruled out but rest on far less.

Strictly, no; it is a tension between an expectation and an observation, which is why some researchers prefer "the Fermi question" or "the Great Silence." It only becomes a paradox if you are confident that intelligent life should be common and visible, and that confidence is exactly what is in dispute.

No. NASA has found evidence that Mars was habitable in the past, with rivers, lakes, and the right chemistry, and in 2025 it described a rock sampled by Perseverance, Cheyava Falls, as carrying a "potential biosignature." That is the strongest candidate to date, and it is not a detection of life: non-biological processes could produce the same features.

Yes, mostly as ice: in the polar caps and in extensive subsurface deposits detected by radar, with liquid brines possible in some conditions. Ancient Mars had abundant liquid water at the surface, which is why the rovers explore former river deltas and lakebeds.

One of the three biology experiments, the Labeled Release test, produced a result that looked like metabolism, but the landers' instruments detected no organic molecules in the soil, and most scientists concluded the reaction was chemical, driven by reactive perchlorates and radiation. A minority, including experiment designer Gilbert Levin, argued for a biological reading until his death.

In 2026 researchers reported a region of unexpected warmth deep beneath the southern highlands, inferred from gravity and seismic data rather than direct measurement. If confirmed, it suggests Mars' interior is more active than assumed and that liquid water could persist at depth, which is where any present-day Martian life would most plausibly be.

At the Big Ear radio telescope of Ohio State University, located in Delaware, Ohio, which was then running a SETI survey. The telescope was dismantled in 1998.

At 10:16 p.m. Eastern time on August 15, 1977. Astronomer Jerry Ehman found it days later while reviewing the computer printout and circled the sequence "6EQUJ5," writing "Wow!" in the margin.

The frequency of the hydrogen line, the radio emission of neutral hydrogen at a wavelength of 21 centimeters. SETI searches watch that band because any technological civilization would know it, and the Wow! signal was recorded right beside it, at about 1420.456 MHz.

Not conclusively. A 2017 proposal that it was hydrogen from passing comets was rejected by the original team. A 2024 analysis led by Abel Méndez suggested a rare natural event, a maser-like flare from a cold hydrogen cloud, as a possibility. The signal was never detected again despite repeated searches, which is the strongest argument against a deliberate transmission.

A volunteer computing project run by UC Berkeley from 1999 to 2020 in which home computers analyzed Arecibo radio-telescope data for signs of extraterrestrial signals, originally as a screensaver.

No confirmed signal. A 2004 candidate, SHGb02+14a, was briefly publicized and then dismissed as an artifact. The project's results are limits on what is not there.

It went into hibernation in March 2020 to concentrate on analyzing two decades of data, with the team citing diminishing returns. Breakthrough Listen and other programs continue the search with dedicated telescopes and computing.

Nobody knows. There is no confirmed detection of life beyond Earth as of 2026. Most scientists consider microbial life somewhere in the universe likely given how common planets and water are, regard intelligent life as an open question, and find no verified evidence that aliens have visited Earth.

No. NASA has found potential biosignatures, most notably mineral patterns in a Martian rock drilled by Perseverance in 2024, and hints in exoplanet atmospheres, but none has met the standard for a detection of life. NASA has never announced the discovery of alien life.

No one can put a real number on it, because the probability that life starts on a suitable planet is unknown. With billions of potentially habitable planets in the Milky Way, even a tiny chance per planet would mean life elsewhere; a small enough chance would leave Earth alone. Finding a second origin of life, even a microbe, would change the estimate more than anything else.

There is no verified evidence that they have. Every UFO case that has been fully investigated has an ordinary explanation or remains simply unidentified, and the 2024 AARO historical review found no evidence of extraterrestrial technology in any U.S. government record. Whistleblower claims to the contrary have not been accompanied by evidence.

Two results lead: the potential biosignature in the Martian rock Cheyava Falls, published in 2025, and the disputed detections of biology-linked gases on the exoplanet K2-18b. Both are labelled "potential" because non-biological processes can produce the same signals. The 1977 Wow! signal remains the best SETI candidate and has never repeated.

Moscovium, a synthetic superheavy element first made at the Joint Institute for Nuclear Research in Dubna in 2003, confirmed by IUPAC in 2015, and named in 2016. Every known isotope decays in well under a second. Lazar described a stable form of the element in 1989, fourteen years before any was produced; no stable isotope is known.

In his account, the craft at S-4 ran on a reactor in which element 115, bombarded with protons, transmuted to element 116 and released antimatter, and the same material produced a "gravity wave" that could be amplified and aimed to bend spacetime and propel the craft. Physicists point out that no mechanism links element 115 to gravity and that the described stability contradicts what was later measured.

The site south of Area 51, at Papoose Lake, where Lazar says he worked on the reverse-engineering of nine alien craft in 1988–89. No public record of a facility by that name exists, and the area is inside the Nevada Test and Training Range.

Unresolved after more than thirty years. His claimed degrees from MIT and Caltech have never been verified, but a 1982 Los Alamos telephone directory does list him, and he has told a consistent story for decades. Supporters take the consistency as sincerity; skeptics note that a consistent story is also what a practiced one looks like.

People. Doug Bower and Dave Chorley admitted in 1991 to making around 200 formations in southern England with planks and rope since 1978, and organized teams such as the Circlemakers have produced elaborate commissioned designs since. No formation has ever been shown to have a non-human origin.

Modern crop circles appeared in southern England in the late 1970s and grew in number and complexity through the 1980s and 1990s. A 1678 pamphlet, "The Mowing-Devil," is often cited as a precedent, and the 1966 Tully "saucer nest" in Australia is an early flattened-reed case.

Some formations have no identified maker, which is not the same as being unexplainable: makers work at night and rarely claim their work. Claims of anomalous node changes in the stalks, made by the BLT research team, have not been reproduced by independent labs.

Mostly in Wiltshire and Hampshire, England, near sites such as Avebury and Silbury Hill, between late May and August when the wheat and barley are tall enough to hold a pattern. Sites publish locations within days, and farmers increasingly charge for access.

No. Germany built jet and rocket aircraft, a flying wing and one failed circular-wing prototype, but no disc flew and no saucer program exists in the Air Ministry records or in the reports of Allied technical intelligence teams in 1945. The saucer claims began in 1950 with Rudolf Schriever and other postwar claimants who produced no evidence.

A bell-shaped device described by the Polish writer Igor Witkowski in 2000 as an SS antigravity and time experiment in a Silesian mine. His source was interrogation transcripts nobody else has seen; no wartime record of the project, its codename or its materials exists, and the "test rig" at Ludwikowice is a cooling-tower base.

A series of Nazi flying saucers that exist only in drawings and specifications circulated from the late 1980s by Ralf Ettl and Norbert Jürgen-Ratthofer, associated with a neo-Nazi occult circle. The Haunebu images on the internet all descend from those documents; no such craft appears in any wartime source.

No. Vril is an energy from an 1871 novel; the "society" comes from a 1947 essay recalling a trivial occult group and was inflated by "The Morning of the Magicians" in 1960. The medium Maria Orsic and her channeled saucer plans first appear in 1990s neo-Nazi occult material.

No. Germany surveyed part of Antarctica in 1938–39 and the U.S. ran Operation Highjump in 1946–47, but the story connecting them to a saucer base comes from a 1974 book by the Holocaust denier Ernst Zündel, who admitted the UFO material was a promotional device. The region has been surveyed by several countries since.

There is no evidence that the footage is genuine. It has no traceable source, the uploader never substantiated the KGB-archive story, and visual-effects analysts consistently read it as a 3D animation with film-damage effects added. Until an original with provenance appears, the reasonable answer is no.

Nobody has ever claimed it. The clips were posted in 2011 by a YouTube channel called ivan0135 that offered no identity or sources and went quiet. The most common theory is that a skilled animator made it as a demo reel or a prank and chose to stay anonymous.

According to the uploader's captions, a grey-type extraterrestrial from the Zeta Reticuli system, filmed by Soviet intelligence sometime between the 1940s and 1960s after a craft was recovered. That is the claim, not a finding; none of it has been verified.

Copies of the 2011 clips and the 2026 re-uploads are all over YouTube and social media under the name "Skinny Bob." Be aware that many are upscaled, cropped, or re-edited; sharper does not mean more authentic.

For most viewers, The Phenomenon (2020) by James Fox: a careful, well-sourced overview from Roswell to the 2017 Pentagon disclosures, with interviews from senators and pilots to the Ariel School witnesses.

It is presented as one, but its central claim, that ancient monuments and myths record alien visitors, is rejected by archaeologists and historians. Watch it as entertainment and as a study of the belief.

Encounters (2023, Amblin), Investigation Alien (2024, George Knapp), and Top Secret UFO Projects: Declassified (2021) are Netflix originals; availability of other titles varies by region and changes often.

They are real objects, but the evidence indicates they are constructed from ancient human and animal remains rather than being the bodies of unknown beings. Peruvian archaeologists, forensic experts and the World Committee on Mummy Studies have described the smaller specimens as fabricated, with rearranged human bones and llama skull fragments; independent examination has never been permitted.

Samples came back predominantly human. The "30 percent unknown" figure cited at the 2023 hearing reflects degraded and unmatchable sequence, which is normal for ancient and contaminated samples; it is not evidence of a non-human species. Radiocarbon dates of around a thousand years match the age of Nazca-era human remains.

A Mexican television journalist and ufologist who has promoted UFO cases since the 1990s, including the 2015 "Roswell slides" that turned out to show a mummified child. He presented the Nazca specimens to Mexico's Chamber of Deputies in September 2023 and again in 2024.

Several are held at the National University of San Luis Gonzaga in Ica, Peru, whose researchers defend their authenticity. Peru's Ministry of Culture has sought their return as cultural property, and figures intercepted at Lima airport in 2023 were kept by Peruvian authorities after forensic examination found them to be dolls.

Two small desiccated figures, named Clara and Mauricio, from the same Nazca series that surfaced in 2017. They were presented by Jaime Maussan at a public hearing on September 12, 2023, with a second presentation in September 2024. The Mexican Congress did not endorse the claims; the hearing was an open session at which invited speakers presented.

By reach, probably David Bowie's "Starman" (1972), whose alien waits in the sky with a message for the children of Earth, or Katy Perry's "E.T." (2011), which spent five weeks at number one. By age, Sheb Wooley's "The Purple People Eater," a novelty about a one-eyed, one-horned visitor that topped the American chart for six weeks in 1958, and is still the first alien song most people learn.

Not really. Their early space-rock, "Astronomy Domine," "Interstellar Overdrive" and "Set the Controls for the Heart of the Sun," is about the cosmos rather than visitors, and "Brain Damage," the song people usually mean, is about madness, not abduction; the songs about mind control article explains what its lunatic and its voice in the head are about. Roger Waters has said the band never wrote about flying saucers.

Foo Fighters, named by Dave Grohl in 1995 after the "foo fighters," the balls of light Allied pilots reported over Europe in 1944 and 1945, with a label called Roswell Records; UFO, the British hard-rock band formed in 1969 and named after a London club; and Klaatu, the Canadian band named for the alien of The Day the Earth Stood Still, whose 1976 single became the Carpenters' "Calling Occupants of Interplanetary Craft."

Madness, and one man's in particular. Roger Waters wrote it about Syd Barrett, the band's founder, whose breakdown had forced him out in 1968, and about the fear of following him; the lunatic on the grass, on the path and in the hall is the person losing his hold, and the song's promise to meet him on the dark side of the moon gave the 1973 album its title. It is not about aliens or anyone else's control, though the lyric is often read that way.

Dissociation, the sense that the thoughts arriving are not one's own. Waters was describing what he had watched happen to Barrett and what the album's pressures, time, money, conflict and travel, could do to anyone; the line describes a mind that has become a room with a stranger in it. The maniacal laughter around it belongs to the band's road manager, Peter Watts, recorded at Abbey Road.

Yes. James Hetfield has said the 1986 song is about addiction, with the drug as the puppet master pulling the user's strings, and the chorus is the master mocking the puppet; it is the clearest mind-control song in metal and was written with a real controller in mind. Its use in the 2022 season of Stranger Things put it on the singles charts thirty-six years after release.

He said so, in print. On the evening of August 23, 1974, Lennon and May Pang watched a round, flat object with lights move over the East River from the balcony of their apartment on East 52nd Street in Manhattan; Lennon printed the date and the sighting in the liner notes of Walls and Bridges, released that September, and Pang has described the object in interviews ever since. He was sober, by both accounts, and irritated that his camera had no film.

That they connected to his mind. In his 2011 memoir Red the singer describes waking in his bedroom in Fontana, California, at around nineteen, aware of a craft and of beings who were, in his words, downloading and uploading his mind through a connection he compares to wireless, and he has repeated the account in interviews, insisting it was not a dream. He has also described childhood sightings and says the experiences fed his interest in space.

His company published them. In October 2017 the Blink-182 guitarist launched To the Stars Academy of Arts and Science with Luis Elizondo, who had run the Pentagon's AATIP programme, and Christopher Mellon, a former deputy assistant secretary of defense; the three Navy infrared videos, FLIR1, Gimbal and GoFast, were released through the company alongside the New York Times story of December 16, 2017, and the Pentagon formally released the same footage in April 2020.

A name, coined by the critic Mark Dery in a 1993 essay, for the tradition in Black art of imagining the future, and outer space in particular, as a place of freedom, and of using the alien, the robot and the spaceship to talk about a history of abduction and displacement. Its founders in music are Sun Ra and George Clinton; its recent faces include Janelle Monáe, Flying Lotus and the Wakanda of Black Panther.

In the Smithsonian. The National Museum of African American History and Culture acquired a Mothership in 2011, before the museum opened, and displays it in its music galleries; it is the replica built for the 1990s tours, the original 1976 ship having been scrapped in a Maryland junkyard in the early 1980s when the band could no longer afford to store it.

Yes, decades before the word. Elijah Muhammad taught from the 1930s that a great wheel-shaped craft, the Mother Plane, built by Black scientists, circled the Earth and would one day destroy the white world, a doctrine drawn from Ezekiel's wheel; Louis Farrakhan has said that in 1985 he was carried aboard it in a vision on a Mexican mountain. It is the most developed UFO belief in any American religion.

Not the word. Kenneth Arnold told reporters on June 24, 1947 that the nine objects he saw over Mount Rainier moved "like a saucer if you skip it across the water," describing the motion, not the shape; the East Oregonian and the wire services turned that into "flying saucer" within a day. Fiction then supplied the shape: within three years the disc was on cinema screens, and later witnesses described discs far more often than Arnold's crescents.

Both, in turns. The 1950s saucer films took their plots from newspaper reports and Donald Keyhoe's books; the Greys of 1980s abduction accounts took their face from a 1975 TV film and a 1987 book cover; the 1990s revival of Roswell ran on The X-Files. Each side reads the other and hands it back.

Skeptics call it the cultural source hypothesis: witnesses describe what their culture has already shown them, so the reported alien changes as the screen alien does. Researchers who take the reports at face value answer that the screen copied the witnesses. The record supports a loop rather than a single direction, which is what this article lays out decade by decade.

The reports came first, then the screen fixed the image. Barney Hill described large-eyed beings under hypnosis in 1964, the TV film about the Hills aired in 1975, and the 1987 cover of Whitley Strieber's Communion gave the being its now-standard tapered face and black almond eyes. Abduction accounts after 1987 describe that cover far more consistently than accounts before it.

Close Encounters of the Third Kind (1977) gave the small, slender, big-headed alien its first close-up for a mass audience, and Communion (1989), from Strieber's book, put the black-eyed face on screen. The X-Files (1993–2002) then made the Grey a weekly television fixture and tied it permanently to Roswell and the cover-up.

Because they are drawing the same source. After 1987 the Communion face was the reference for abduction memoirs, the researchers who compiled them, and the productions that adapted them, so films, series, parodies and even the 👽 emoji reproduce one design. A production that shows a different abductor now reads as a deliberate departure.

Egg, facehugger, chestburster, adult. An egg opens when something warm approaches; the facehugger inside clamps onto the host's face, implants an embryo down the throat and dies; within hours the embryo erupts from the host's chest as a chestburster, which grows to a two-metre adult in less than a day. In Aliens (1986) a queen lays the eggs; in the 1979 film the eggs simply exist in the derelict ship, which is why the two films' fans still argue about which came first.

The first film never says. The eggs sit in the hold of a crashed alien ship on the planetoid LV-426, and the crashed pilot, the "Space Jockey," is the only clue. Prometheus (2012) and Alien: Covenant (2017) rewrote the origin: the pilot was an Engineer, the species that made humans, and the creature is the product of their black liquid, refined by the android David into the form seen in 1979. The films leave open whether David invented it or rediscovered it.

The 1979 film calls it "the alien" and nothing else. In Aliens (1986) Lieutenant Gorman uses "xenomorph," a generic military term meaning "strange form," in a briefing, and fans adopted it as the species name. Later comics, games and novels use it as a proper noun; the films mostly avoid it.

The films never name it. The novels and comics call the species the Yautja and their home world Yautja Prime, a hot, high-gravity jungle world, and Predator: Badlands (2025) is the first film to show a Predator world at all. Fans and licensed tie-ins have used both "Yautja" and "Hish" for the species; the films use neither.

For sport and status. A Predator hunts dangerous prey to earn trophies and rank, and the films establish rules: an armed and capable target is worth hunting, an unarmed, sick or pregnant one is not, and a hunter who fails is expected to die by his own weapon. Humans are hunted because we are armed, clever and abundant, and Earth's hottest years draw hunting parties the way a game reserve draws tourists.

Since 1990, when a Xenomorph skull appeared on the trophy wall in Predator 2. Dark Horse comics ran the crossover from 1989, two Alien vs. Predator films followed in 2004 and 2007, and the two franchises share rights holders. The main Alien films ignore the crossover; the Predator films acknowledge it in passing.

A species of pale, hairless, three-metre humanoids whose DNA matches ours. Prometheus (2012) identifies them with the "Space Jockey," the fossilized pilot found in the derelict ship in Alien (1979), and shows one of them dissolving himself into a river to seed a young world with life. The film's scientists call them Engineers because they appear to have engineered humanity.

The films say yes and never explain why. The opening of Prometheus shows an Engineer's DNA breaking apart in a river on what is implied to be early Earth, and the expedition later finds the Engineers' DNA is a match for human DNA. What the film withholds is the motive for creation and the motive for the later decision to destroy, which Ridley Scott has said in interviews was punishment for something humans did about two thousand years ago.

The film does not say. The outpost on LV-223 was a military installation stocked with the black liquid and pointed at Earth, and its ships were loaded about two thousand years before the story, when an accident killed the crew. Scott's stated idea, that the Engineers sent an emissary who was crucified, was cut from the script, and Alien: Covenant (2017) dropped the question by having the android David wipe out the Engineers' home city instead.

From Earth's bacteria. Mars, in the novel, had long since eliminated microbial disease, so the Martians had no immunity; within weeks of landing they were dying in their machines of infections humans shrug off. Every adaptation keeps the ending, because it is the point: humanity survives by a right earned through a billion deaths of its ancestors, not by any weapon.

Not tripods. The machines were tripods; the Martians themselves were bodies the size of a bear, mostly head, with two large dark eyes, a V-shaped beak-like mouth, no nose, and two clusters of eight tentacles for hands. They had no digestive system and fed by injecting the blood of other creatures directly into their veins. Wells describes them as what humans might become if the brain went on developing and the body did not.

Because in the 1890s Mars was where educated people expected to find neighbours. Giovanni Schiaparelli had mapped "canali" (channels) in 1877, the word was mistranslated as "canals," and Percival Lowell had just published maps of a planet-wide irrigation system built by a civilization fighting drought. Wells took Lowell's dying Mars and asked what such a people would do about the wet, green planet next door.

Pandora, which is a moon rather than a planet. In the films it orbits Polyphemus, a gas giant in the Alpha Centauri system, about 4.4 light-years from Earth; the human ships take nearly six years to reach it. Pandora has a lower gravity than Earth, an atmosphere humans cannot breathe, and an ecosystem linked into a single neural network the Na'vi call Eywa.

No, but the address is. Alpha Centauri is a real triple star system and the nearest to the Sun; the planet Proxima Centauri b, confirmed in 2016, orbits its smallest member. No moon like Pandora has been found around any of the three stars, and no gas giant like Polyphemus has been detected in Alpha Centauri A's habitable zone, though the search continues.

James Cameron has given two answers: a practical one, that blue is the colour least likely to clash with the green jungle and the least associated with human skin, and a mythic one, that blue skin in Hindu iconography, which he cited for the word "avatar" itself, marks a divine being. Within the story there is no explanation; it is simply what the species looks like.

Heptapods, from the Greek for "seven feet": each has seven limbs arranged around a radially symmetric body. The film's scientists nickname the two they work with Abbott and Costello. The species never names itself, and the film never says where it comes from.

To give humanity their language. In the film, learning to read Heptapod B changes how the learner perceives time, and the heptapods say they need humanity's help in three thousand years and are making the gift now so that humans will be able to give it. The film calls the language a "weapon" in translation and a "tool" in intent, and the misunderstanding nearly starts a war.

On a novella: Ted Chiang's "Story of Your Life," first published in 1998 in the anthology Starlight 2 and collected in Stories of Your Life and Others (2002). Eric Heisserer's screenplay kept the linguist, the heptapods, the two languages and the structure in which the narrator's daughter's life is told in the future tense; the twelve ships, the global crisis and the Chinese general were added for the film.

It is a slur. The humans of the film name them after the Parktown prawn, a large king cricket common in Johannesburg gardens that residents regard as a pest, because the aliens are bipedal arthropods with mandibles and a hard shell. The film never gives the species' own name for itself; the one alien we come to know is called Christopher Johnson, a name assigned by the humans.

The film does not say. The mothership appeared over Johannesburg in 1982, drifted to a stop and hung there; when humans cut their way in after three months they found a million malnourished aliens and no working command crew. The implication, never confirmed, is that the ship's leaders died and the survivors are worker-caste beings with no way home until Christopher repairs the buried command module.

A sequel titled District 10 was announced by Neill Blomkamp in 2021, with Terri Tatchell and Sharlto Copley co-writing, and as of 2026 it has not entered production. Blomkamp has said the story exists and that timing depends on his other projects.

The fourth planet of the star Sirius, according to the Visitors' own broadcasts in the 1983 miniseries, a world they say is dying and in need of Earth's water and chemicals. Whether that account is true is never confirmed, and the 2009 remake gave its Visitors no named home at all.

Yes. Under a synthetic human skin the Visitors are green-scaled, yellow-eyed reptiles with forked tongues, a fact the series reveals when the scientist Diana swallows a live guinea pig whole and when a Visitor's face is torn during a fight. They have come for water and to take humans as food and slaves; the friendly arrival was a cover story.

It supplied the picture. David Icke's claim that shape-shifting reptilians rule the world in human disguise appeared in The Biggest Secret in 1999, sixteen years after V put lizards in human skin in front of 40 million viewers. Icke draws on older sources, including Zecharia Sitchin's Anunnaki and pulp fiction, but the image of a leader peeling back a human face is the show's.

From space, as seeds. In Jack Finney's novel the pods drifted between worlds for ages, riding light pressure, and landed in a farmer's field outside a California town; they are a species that has already emptied other planets and moves on when a world is used up. Each pod grows a blank copy of the nearest sleeping person, and the copy absorbs that person's memories and body while the original crumbles to dust.

Its makers said no, and audiences have never believed them. The 1956 film has been read since release as a warning against communist infiltration and, with equal conviction, as a satire of McCarthy-era conformity; Don Siegel, the director, said it was about people who had let their feelings die, and Finney said it was a thriller. The story works for any decade that fears its neighbours are no longer themselves, which is why it has been remade every twenty years.

Four direct adaptations: Invasion of the Body Snatchers (1956, Don Siegel), Invasion of the Body Snatchers (1978, Philip Kaufman), Body Snatchers (1993, Abel Ferrara) and The Invasion (2007, Oliver Hirschbiegel), plus a long line of films and episodes that borrow the premise without the title, from The Faculty to The Thing.

A colony of cells rather than a creature. Every cell of the Thing is an independent organism that can absorb and copy any living cell it touches, so the whole imitates a person, a dog or a mix of both as needed, and any severed piece will try to survive on its own, which is what the blood test in the 1982 film exploits. It has no true form; the shapes it takes when exposed are what it grabs from its victims in a hurry.

A flying saucer that crashed in Antarctica about 100,000 years ago and lay under the ice until a Norwegian team dug it out in the 1982 film's backstory (shown directly in the 2011 prequel). Whether the Thing built the ship or was a passenger, a cargo or an infection aboard it is never stated; Carpenter's film shows it beginning to build a craft of its own from helicopter parts, which suggests it knows how.

On a novella: "Who Goes There?" by John W. Campbell, published in Astounding Science-Fiction in August 1938 under the name Don A. Stuart. It was filmed first as The Thing from Another World (1951), which dropped the shape-shifting for a vegetable humanoid, then faithfully by John Carpenter in 1982, whose film is the source for the 2011 prequel and the video games.

The film never names it. E.T. is a short, squat, long-necked botanist with a glowing heart, and his shipmates are the same; the 1985 novel E.T.: The Book of the Green Planet, written by William Kotzwinkle with Spielberg's approval, calls the home world Brodo Asogi and its people a plant-loving species of great age. Fans use "Asogian"; the films do not.

On screen, somewhere reachable by the ship that collects him at the end; the film shows only that it is far and that he can signal it from a California hillside. Kotzwinkle's novelization and its sequel call the planet the Green Planet, a world of intelligent vegetation where E.T. is a young member of a species that lives for centuries. The novels are the only source for any of this.

Collecting plants. The film opens with a botanical expedition gathering specimens in a California forest; when human vehicles approach, the ship lifts off in a hurry and one crew member, too far from the ramp, is left behind. Everything that follows, the hiding, the communicator, the illness, comes from a scientist missing his ride.

To build a hyperspace express route through the solar system. The plans, a Vogon captain explains, had been on display at the local planning office on Alpha Centauri for fifty Earth years, and Earth had filed no objection. The demolition takes about two minutes and the fleet moves on. Douglas Adams was a satirist of bureaucracy first and a science fiction writer second, and the Vogons are the joke.

The third worst in the universe, according to the Guide, behind the Azgoths of Kria and Paula Nancy Millstone Jennings of Sussex. Vogon captains read it to prisoners as a form of torture, and the Guide notes that the Vogons' own reaction to their poetry is unknown because nobody has survived a full recital. Adams wrote the sample stanzas himself.

Vogsphere, a world of bogs and low hills whose evolutionary process, the Guide says, gave up on the Vogons early. They left it long ago for the Galactic Civil Service, and the Guide's account of their planet exists mostly to explain why a species that hates poetry, philosophy and pleasure would be so good at paperwork.

Kashyyyk, a forest world whose wroshyr trees grow kilometres tall; Wookiee cities are built in the canopy, and the forest floor is left to predators. The planet appears in Revenge of the Sith (2005), where the clone army fights alongside the Wookiees, and its later occupation by the Empire is the backstory of Solo (2018) and the animated series.

Around four hundred years. Chewbacca is about 200 years old in the original trilogy, having been born, by the current canon timeline, two centuries before the Battle of Yavin, and he is still active and unchanged thirty years later in the sequels. A Wookiee of 200 is middle-aged.

Nobody has ever given a good in-story answer. At the end of Star Wars (1977) Leia hangs medals on Luke and Han while Chewbacca stands beside them and roars; George Lucas said Wookiees do not care for medals, fans have joked about it for decades, and The Rise of Skywalker (2019) finally had Maz Kanata hand Chewbacca a medal, Han's, after Leia's death. Peter Mayhew, who played him, received a real one from the Star Wars fan club in 1997.

Nal Hutta, a polluted swamp world in the Y'Toub system that the Hutts colonized and renamed "glorious jewel" in their own language. The species' original home, Varl, is described in the reference material as a ruined world the Hutts left long before the films; the older novels say its suns were destroyed, and the current canon leaves the cause vague.

About 600 years old when Leia strangled him in Return of the Jedi, according to the reference books, which makes him middle-aged for a Hutt. The species can live a thousand years or more, and Hutts keep growing throughout their lives, which is why the oldest are the largest.

Both, or either, depending on the source. The older reference material describes Hutts as hermaphrodites who choose which role to present and can bear young alone; the current canon keeps them able to reproduce without a partner while referring to individual Hutts as he or she by their own preference. Jabba is "he," and so is his son Rotta in The Clone Wars.

It has no name. George Lucas has said the species is meant to stay a mystery, and every official reference lists it as "unknown" or, when a label is needed, "Yoda's species." Three members have appeared on screen: Yoda, the Jedi Master Yaddle on the Council in The Phantom Menace (1999), and Grogu in The Mandalorian (2019).

Unknown. Dagobah, where Yoda lives in The Empire Strikes Back, is a place of exile, not a home; the films and series never show or name the species' world. The only clue is that the species is rare enough that Grogu's existence is treated as remarkable by everyone who meets him.

No. Grogu was born about fifty years before The Mandalorian, which puts his birth around the time of The Phantom Menace, when Yoda was some 850 years old and celibate by the Jedi code; the series presents him as a Jedi youngling rescued from the Temple during Order 66, with no stated relation to Yoda beyond species. Fans called him Baby Yoda for a season before the name Grogu was revealed.

Because it is based on copper rather than iron. Human blood carries oxygen with haemoglobin, which is red when oxygenated; Vulcan blood, the series established from the 1960s, uses a copper compound, which the writers modelled on the haemocyanin of real octopuses and horseshoe crabs, whose blood is blue-green. It is why Spock bruises green and why a Vulcan doctor needs different drugs.

40 Eridani A, a real orange dwarf about 16 light-years from Earth. Gene Roddenberry endorsed the identification in a 1991 letter to Sky & Telescope co-signed by three astronomers, and Star Trek: Enterprise confirmed it on screen. In 2018 astronomers announced a planet around 40 Eridani A and nicknamed it Vulcan; a 2024 study found the signal was probably stellar activity, and the real Vulcan was withdrawn.

April 5, 2063. In Star Trek: First Contact (1996) Zefram Cochrane makes humanity's first warp flight from a missile silo in Montana, a passing Vulcan survey ship detects the warp signature, and its crew lands that evening to introduce themselves. The date is celebrated in the series as First Contact Day, and by fans in the real world every April.

Budget in 1967, then a story in 2005. The original series gave Klingons dark makeup and goatees and no ridges; Star Trek: The Motion Picture (1979) added the forehead ridges as soon as the money allowed, and the franchise ignored the change for 26 years. Enterprise explained it in 2005: a genetic-engineering virus in the 22nd century stripped a generation of Klingons of their ridges, which returned as the cure spread. Discovery (2017) redesigned them again and partly walked it back.

Qo'noS, pronounced and often spelled Kronos, a green, stormy world that is the capital of the Klingon Empire. The 1991 film The Undiscovered Country made the explosion of its moon Praxis, which wrecked the planet's atmosphere, the crisis that forced peace with the Federation, and the Khitomer Accords that followed are the franchise's Cold War ending.

It is a constructed one that people actually speak. Marc Okrand built it for Star Trek III (1984) from a few words James Doohan had improvised in 1979, published The Klingon Dictionary in 1985, and has expanded it since; the Klingon Language Institute was founded in 1992, Hamlet has been translated, and a few dozen people worldwide are fluent. Its grammar is object-verb-subject and its sounds were chosen to be unlike any single human language.

The Delta Quadrant, on the far side of the galaxy from the Federation, where their central structure, the Unicomplex, sits; the series never shows an origin world. Voyager dated the Collective to at least 900 years before its story, and Picard added that the Queen is the Collective's oldest continuous element, but no episode has shown the first Borg or explained who built the first implant.

By injection. A drone extends two tubules from the back of its hand into a victim's neck and injects nanoprobes, microscopic machines that rewrite the blood, grow implants from inside and connect the mind to the Collective within minutes; surgery then adds the eyepiece, the arm and the armour. The Next Generation showed assimilation as surgical; First Contact (1996) introduced the nanoprobes, and every series since has used them.

She says she is not. Introduced in First Contact and played by Alice Krige, the Queen describes herself as the Collective's focus, the one who brings order to its billions of voices, rather than a ruler; she can be killed and reappears, which implies she is a role the Collective fills rather than a person. Fans have argued since 1996 that a hive mind with a queen is a contradiction, and the series has never resolved it.

The 1938 answer was gravity and evolution: Krypton was a heavier planet whose people had evolved great strength, so on Earth a Kryptonian could leap an eighth of a mile the way an ant lifts many times its weight. By the late 1950s the comics had replaced it with the sun: Krypton orbited a red star, Earth orbits a yellow one, and Kryptonian cells absorb yellow sunlight as energy. The films have used the solar version since 1978.

Its own core. In every version since 1938 the scientist Jor-El discovers that the planet is unstable and is disbelieved by its rulers; the comics of the 1980s made the cause a chain reaction in the radioactive core, Man of Steel (2013) blamed the Kryptonians for mining the core for energy, and the 2025 film left the cause off screen. Jor-El and Lara have time to build one small ship, and the child in it is Kal-El.

No, though no one could tell by looking. Kryptonians are a separate species that evolved on another planet and happens to be indistinguishable from humans, a coincidence the comics have explained variously and the films have not bothered to; Kryptonian and human DNA are different enough that a child of the two, in most versions, is impossible or nearly so. The resemblance is a story convenience that turned into a theme: an alien who passes.

The Kree are a militarist empire of blue- and pink-skinned humanoids from Hala, ruled by an organic computer called the Supreme Intelligence and obsessed with genetic advancement; the Skrulls are green, pointed-eared shapeshifters from the Andromeda galaxy who can copy any form and specialize in infiltration. The two have fought for millennia, and every other alien species in Marvel is caught between them.

Depends on the decade. In the comics from 1962 they were invaders and impostors, and Secret Invasion (2008) had them replace dozens of heroes; the film Captain Marvel (2019) reversed the roles, making the Skrulls refugees hunted by the Kree, and the Secret Invasion series (2023) split them into refugees and a rebel faction. The comics have used both readings since, sometimes in the same story.

To make weapons. In the comics the Kree visited Earth in prehistory and altered early humans to create the Inhumans, a strain with latent powers unlocked by a substance called Terrigen, intended as soldiers against the Skrulls; the Kree then abandoned the project. The Inhumans and, in the films, Carol Danvers' powers are what the experiments left behind.

In the films, yes: Thor tells Jane Foster in Thor (2011) that where he comes from magic and science are the same thing, and the Asgardians are a species from another world, Asgard, reached by a bridge across space. In the comics they are closer to gods, born of the Norse myths and dependent on human belief, and the two versions have never been reconciled; the films' Asgardians are what the ancient astronaut theory says all gods were.

About five thousand years in the films. Odin was roughly that age at his death, Thor says he is 1,500 in Avengers: Infinity War (2018), and the golden apples of Idunn keep the comics' Asgardians young indefinitely. Asgardians age, but slowly enough that Thor was a young man for a thousand years.

By upbringing, not by birth. Thor (2011) reveals that Loki was a Frost Giant, a Jotun, abandoned as an infant on Jotunheim and taken by Odin after the war with the giants; his blue skin shows when he touches Jotun ice. The comics told the same story from Loki's first origin in 1963, which made the adopted son's resentment the family's plot for sixty years.

Yes. Every version of the franchise since the 1984 cartoon makes them Cybertronians, a species of living mechanical beings native to the planet Cybertron who came to Earth, and their vehicle forms are disguises adopted here. They are not human-built robots, and the question of whether they are alive is one the stories answer with a yes: each has a spark, a living core, and can die.

Cybertron, a metal world that in most versions is itself a living being or was built by one, and that the civil war between Autobots and Decepticons has left dark and drained of Energon. Its location is never given; the 2007 film has it destroyed, the 1986 animated film has it orbited by the planet-eater Unicron, and Transformers One (2024) shows it before the war.

Alive, by the franchise's own rules. Each Cybertronian has a spark, the animating essence that the comics and cartoons treat as a soul and that returns to the Allspark or the Well of All Sparks at death; they feel pain, form loyalties, betray one another and grieve. The robot question is the one the humans in each story ask first and stop asking.

A mutant. The casing is a travel machine, and the creature inside is a small, tentacled, one-eyed organism descended from the Kaleds of Skaro, engineered by Davros to feel nothing but hate. The series showed it clearly for the first time in 1988 and in close-up in "Dalek" (2005); it is roughly the size of a cat and cannot survive long outside the shell.

Because their creator built them to. Davros designed the Daleks to regard every other form of life as inferior and to remove it, and "Exterminate!" is their statement of policy and their battle cry; the word entered the series in 1964 and has been shouted, in a voice made with a ring modulator, ever since. The Daleks do not negotiate, retreat or take prisoners except to use them.

No, though the casing looks like one. A Dalek is a living creature in a machine, and the distinction matters to the stories: the mutant can be removed, can mutate further, and in "Dalek" (2005) can be contaminated by human DNA and feel something. Robot Daleks, built as decoys, have appeared, and the Daleks themselves regard them as beneath contempt.

Yes, from the planet Gallifrey, though the series took six years to say so: the Doctor was an exile of unspecified origin from 1963 until "The War Games" (1969) named the Time Lords, and Gallifrey itself was named in 1974. "The Timeless Children" (2020) complicated it again by revealing that the Doctor was not born a Time Lord at all but was found as a child from an unknown world, and that the Time Lords took regeneration from her.

Twelve, for thirteen lives, by the rule set in "The Deadly Assassin" (1976). The Doctor used the last of them in "The Time of the Doctor" (2013), and the Time Lords granted a new cycle; the 2020 revelation that the Doctor is the source of regeneration implies no limit at all for her. Other Time Lords, the Master included, have found their own ways round the count.

Because a 1970 script needed the Doctor to be visibly not human when a doctor examined him: "Spearhead from Space" gave him a binary vascular system and a body temperature of 15 degrees Celsius, and the series has kept both. The second heart grows in at the first regeneration, and a Time Lord can survive the loss of one.

Zerus, a volcanic jungle world where they began as small parasitic larvae that survived by burrowing into other creatures and taking their traits. The Xel'Naga, the ancient species that also shaped the Protoss, found them there and gave them a single shared mind; the Swarm later moved its centre to the ash world Char, where the first game's Zerg campaign ends.

The Xel'Naga shaped them, and, the second game's campaigns revealed, a corrupted member of that species, Amon, did the shaping in order to build a weapon. The Overmind that ruled the Zerg in the first game was Amon's instrument, and its drive to assimilate the Protoss was his plan; the Overmind's own last act was to make Kerrigan, who could break free.

She was made one. Sarah Kerrigan, a human psychic soldier abandoned by her commander on Tarsonis in the first game, was captured and infested by the Zerg and reborn as the Queen of Blades, the Swarm's ruler after the Overmind's death. Heart of the Swarm (2013) restored her humanity, then had her choose the Swarm again, and Legacy of the Void (2015) transformed her into something beyond either.

Two-kilometre sentient warships that wait in the dark space beyond the galaxy's rim and return every fifty thousand years to destroy every civilization advanced enough to travel between the stars. Each Reaper is built from a harvested species, its people liquefied and poured into a new hull, so that the fleet is the galaxy's previous inhabitants; the first one the player meets, Sovereign, describes itself as beyond comprehension.

To prevent, they claim, a worse extinction. The Catalyst, the intelligence that directs them, was built to solve the conflict between organic life and the synthetic life it creates, concluded that synthetics always destroy their makers, and settled on harvesting organic civilizations at a fixed interval, preserving each as a Reaper, so that new life can rise and repeat the cycle. The trilogy's heroes find the reasoning monstrous, and the games agree.

The Leviathans, by accident. A species of enormous aquatic beings that ruled the galaxy a billion years before the games built an intelligence to study why their thrall species kept building machines that turned on them; the intelligence, the Catalyst, decided the Leviathans were part of the problem, harvested them, and built the first Reaper, Harbinger, from their bodies. The Leviathan expansion (2012) tells the story.

Alien Life Form. It is the name Willie Tanner gives the creature that crashes into his garage in the 1986 pilot; the alien's own name is Gordon Shumway, and the show uses both. The acronym was the working title of the series, and the character kept it because nobody in the family could be bothered with Gordon.

Because on Melmac cats are livestock. The joke runs through all four seasons: ALF regards the Tanners' cat, Lucky, as dinner, the family regards it as a pet, and the standoff is never resolved, though he never actually eats one on screen. Melmacians also ate other things the show found funny, and ALF's appetite, eight stomachs' worth by his own account, is the engine of half the plots.

Melmac, a world with a green sky and blue grass that was destroyed, ALF says, in a nuclear catastrophe while he was away in the Orbit Guard. He followed a ham radio signal to Earth and crashed into the Tanner garage in the San Fernando Valley. A handful of other Melmacians survived, including his girlfriend Rhonda and his friend Skip, who turn up in later episodes.

The show has never named it. Roger is drawn as a Grey, the small, big-headed, black-eyed alien of the abduction books, with a pot belly and no clothes, and the series treats him as the only one of his kind on Earth. Episodes have shown other members of his species and given several conflicting accounts of why he came, and none of them supplies a name for the planet or the people.

Stan Smith, a CIA agent, rescued him from Area 51 four years before the 2005 pilot after Roger saved Stan's life during an escape, and hid him in the attic to repay the debt. Roger arrived on Earth by crashing, the show ties him to Roswell in 1947, and he spent the decades between in government custody. The debt was repaid long ago; he stays because he likes it.

Originally because an alien could not leave the house. Roger's wigs and costumes began as a way to get him out of the attic, and the writers found that a new persona gave him a new episode: a con man, a limo driver, a wedding singer, a hairdresser, a boxer, a housewife, hundreds of them. By the later seasons the personas have their own lives, enemies and, in the case of Ricky Spanish, a reputation the whole town wants revenge on.

They are drawn identically, which is part of the joke, and the show tells them apart only by voice: Kang is voiced by Harry Shearer and Kodos by Dan Castellaneta. Kodos is female, a fact established in a 1990s episode and treated as obvious ever since, and the two are siblings. Fans keep charts; the writers have admitted they sometimes forget which is which.

Rigel VII, the seventh planet of Rigel, a real star, the blue supergiant in the constellation Orion. The show has occasionally said Rigel IV instead and has never cared about the difference. Their language, Rigellian, is by an astonishing coincidence identical to English.

Yes, since the first in October 1990, though sometimes only for a few seconds: a cameo in a crowd, a line in the closing credits, a shot of their saucer. Their one appearance in a regular episode came in 2015, when the Simpsons were taken to Rigel VII as dinner, and the writers kept the Halloween rule by making the episode's ending non-canonical anyway.

Hello, and also goodbye, on Ork. Mork says it with a hand gesture, the fingers split down the middle in a V, that Robin Williams borrowed from Star Trek's Vulcan salute, and the phrase became one of the most repeated catchphrases of 1979. "Shazbot" is the Orkan swear word and "KO" is Mork's sign-off to Orson at the end of each report.

Because the writers wanted Jonathan Winters to play a baby. Mork and Mindy's son Mearth, hatched from an egg in the fourth season in 1981, is born looking like a middle-aged man and will grow younger, and the show explained that all Orkans age in reverse. Mork himself is therefore somewhere in the middle of his life and has been getting younger since he arrived.

Yes. "My Favorite Orkan," broadcast on February 28, 1978, had Mork land in 1950s Milwaukee to take Richie Cunningham back to Ork as a specimen; Fonzie fights him off and the episode ends as Richie's dream. Robin Williams was cast after a mostly improvised audition, ABC ordered the spin-off within weeks, and Mork & Mindy premiered on September 14, 1978 with the same alien in present-day Boulder.

Remulak, a planet they never describe in much detail, whose inhabitants have tall conical heads, flat affect and enormous appetites. Stranded on Earth, Beldar and Prymaat tell everyone who asks that they are from France, and everyone who asks accepts it. The film adds that Remulak sends its people to conquer other worlds and that Beldar's ship simply crashed.

It is how a Conehead says dinner is ready. The family eats whole loaves, six-packs and bags of chips at a sitting, drinks beer by the case, and describes it all in the flat technical register that is the sketch's main joke: a sandwich is a bread-and-meat unit, a car is a personal transport vehicle, a party is a gathering of Earth persons. The phrase became a catchphrase in 1977 and is still the first thing people quote.

Yes, and has said so for decades. Aykroyd was raised in a family with a serious interest in spiritualism, has described several personal sightings, served as a consultant to the Mutual UFO Network, and made a 2005 interview film, Dan Aykroyd Unplugged on UFOs, in which he argues that the visitors are real and that governments know it. The Coneheads were a comedy, but their inventor was not joking about the premise.

None. Stitch is Experiment 626, a creature genetically engineered by the alien scientist Jumba Jookiba, and he has no home world or species; Lilo registers him as a dog because there is no other box to tick. The films call him an experiment or, when the Galactic Federation is being formal, an illegal genetic experiment, and his relatives are the 625 experiments Jumba made before him.

Because he is too dense. Jumba built him with a molecular density high enough to stop bullets and survive fire, and the same body sinks in water like a stone; the 2002 film uses it as his one weakness, and the sea around Kauai is the only thing on the island that can hurt him. It also explains why an indestructible creature has to be rescued by a child.

Jumba made 626 experiments in numbered order, each with one designed talent, and the 2003 television series had Lilo and Stitch hunting them across Kauai after they were accidentally released. Reuben (625) makes sandwiches and refuses to do anything else; Angel (624) sings a song that turns good creatures bad; Sparky (221) is electricity. Leroy, in the 2006 film, is a clone of Stitch built to be obedient.

Because it obstructs his view of Venus. That is the entire motive, stated in his first cartoon in 1948, and the series never gave him another; he arrives on the Moon with an Illudium Q-36 Explosive Space Modulator, is foiled by Bugs Bunny, and returns in later shorts with the same plan. His quiet, reasonable delivery of a genocidal intention is the joke Chuck Jones built him for.

In Haredevil Hare, released on July 24, 1948, directed by Chuck Jones and voiced by Mel Blanc. He appeared in only five classic shorts, the others being The Hasty Hare (1952), Duck Dodgers in the 24½th Century (1953), Hare-Way to the Stars (1958) and Mad as a Mars Hare (1963), and became one of the studio's best-known characters on the strength of them.

Because the shorts never needed one. He is unnamed in 1948, called the Commander of Flying Saucer X-2 in 1952, and was only christened Marvin around 1979, when Warner Bros. began packaging the characters for television and merchandise. Jones said afterwards that he had never thought of him as having a name at all.

For inventing a doomsday machine, a button that would destroy the universe if pressed. His people on the planet Zetox banished him to the Stone Age as punishment, and he serves his sentence by attaching himself to Fred Flintstone and Barney Rubble, the first two beings he meets, whom he calls dum-dums and is bound to help.

Because Gazoo is visible only to those who believe in him, which in Bedrock means Fred, Barney, the children Pebbles and Bamm-Bamm, and Dino. Wilma and Betty never see him, and half the show's Gazoo plots turn on Fred talking to an empty room. The rule was a way to add an alien to a domestic sitcom without changing the sitcom.

He arrived in October 1965, the show's sixth and final season ended in April 1966, and fans have blamed him ever since; the character is a standard example of a late-series gimmick. The ratings had been falling before he appeared, but a magic alien who could grant wishes did change what kind of show it was, and the writers of later Flintstones projects mostly kept him in a box.

To get rid of him. Zim had wrecked the Irken Empire's first great invasion, Operation Impending Doom I, by attacking his own home planet, and when he turned up uninvited at the launch of Operation Impending Doom II the Almighty Tallest assigned him a planet so obscure it was not on their map and hoped never to hear from him again. Zim took the assignment as an honour and the Earth as a real target.

The metal pod on every Irken's back. It carries their memories, personality and life support, extends mechanical spider legs, stores tools and weapons, and an Irken separated from it dies in about ten minutes; one episode has Dib steal Zim's PAK and begin turning into an Irken himself. It makes the Irken body a vehicle for the PAK rather than the other way round.

Because the Tallest did not want to waste a real robot on Zim. Every invader is issued a SIR unit, a Standard-issue Information Retrieval robot; Zim's was assembled on the spot from spare parts and the contents of the Tallest's pockets, and GIR, whose name the Tallest cannot explain either, is the result: a small silver robot with a broken mind, a pig, a love of tacos and a dog costume that fools everyone on Earth.

To see the end of a television show. In 1999 Fry spilled beer on a console and knocked the last episode of Single Female Lawyer off the air; a thousand years later the broadcast reached Omicron Persei 8, a thousand light years away, and Lrrr, who had been watching, brought his fleet to demand the ending. The crew staged a new episode, and Earth was spared when Lrrr found it satisfactory.

Omicronian babies. In a 2000 episode the Planet Express crew finds a planet covered in delicious fried-looking nuggets, sells them across Earth as Popplers, and discovers when Lrrr arrives that they were the larval young of his species. He demands to eat a human in return, chooses Leela, and is talked out of it by a chain of substitutions the episode treats as diplomacy.

Yes. Omicron Persei, also called Atik, is a hot binary star in the constellation Perseus roughly a thousand light years from Earth, which is why the show chose it: a broadcast from 1999 would arrive there around 3000, the year Futurama is set. No planets have been found there, and a star that hot and young is a poor candidate for any.

A Decapodian, from the planet Decapod 10. Decapodians are lobster-like beings with a hard shell, claws, a fan of tentacles where a mouth would be and a habit of shedding their shells and squirting ink, and Zoidberg is the Planet Express crew's staff doctor despite knowing almost nothing about human anatomy. He is voiced by Billy West.

Because nobody would pay him if they could avoid it. The series plays his poverty as a running joke, he lives in a dumpster, eats garbage and is thrilled by any scrap, and in a 2011 episode explains that he stays at Planet Express out of loyalty to Professor Farnsworth, who promised, decades earlier, to help him end his life if a disease he carried ever surfaced. It never has.

The Decapodians ate them all. When Zoidberg's people arrived on Earth they found anchovies irresistible and fished the species to extinction, so that by the year 3000 a single can from the twentieth century is a collector's item; Fry buys one in a 1999 episode, makes a pizza, and Zoidberg, having tasted it, understands why his ancestors could not stop.

It is never named. They call it the home planet, describe it as a place without physical bodies, families or weather, and refer to their region of space only in jokes; the show's title, which calls Earth the third rock from the Sun, is as specific as the geography gets. Their real forms are gaseous or tube-like, depending on the episode, and they chose human bodies on arrival.

Because someone had to be the woman and the mission's security officer, the most decorated soldier of the group, lost the draw. Sally is a man on the home planet inhabiting a woman's body on Earth, and Kristen Johnston played six seasons of a warrior discovering makeup, dating and the disadvantages of being taken less seriously; the joke won her two Emmys.

The Solomons' supreme commander, whose transmissions arrive through Harry, the family's communicator, in a full-body jolt. Unseen for three seasons, he appeared in person from 1999 as Stone Phillips, a self-satisfied visitor in a silver suit played by William Shatner, who romanced Sally's friend, married a rival and reduced Dick to jelly. Shatner and John Lithgow had both played the same role, an airline passenger who sees a monster on the wing, in different versions of The Twilight Zone, and the show made the joke.

Telepathy, which he uses to read the minds of anyone in the room; levitation, controlled by a pointed finger; invisibility, which fails at inconvenient moments; a pair of retractable silver antennae that rise from the back of his head when he uses his abilities; the ability to talk to animals; and a scientist's knowledge centuries ahead of Earth's. He is also, by Martian standards, young, at around 450.

Exigius 12½, a name the series used rarely and mostly for the joke of the fraction. He is a professor of anthropology on Mars who was studying Earth from orbit when his ship was damaged by a passing rocket plane and crashed near Los Angeles, where Tim O'Hara, a newspaper reporter, found him and, deciding the story would never be believed, introduced him as his uncle.

Yes. It premiered on CBS on September 29, 1963, three years before Star Trek and fifteen before Mork, and it established the form every later one used: an alien stranded in a suburban home, a human who hides him, a landlady who suspects, and a set of powers that cause the week's trouble. It ran three seasons and 107 episodes.

Because their brains, which sit exposed under glass domes, cannot bear the frequency. A teenager in Kansas discovers by accident that his grandmother's record of Slim Whitman's 1952 hit "Indian Love Call" makes a Martian's head burst, the tape is broadcast worldwide, and the invasion ends in a shower of green. Burton chose the song because it was the least likely weapon he could think of.

"Ack ack ack," a duck-like chatter that the film never subtitles, produced by reversing recordings of ducks. Their translation machine renders it as reassurances, most famously an announcement that they come in peace delivered while they are burning Congress, and the joke of the film is that the humans keep believing the machine.

Withdrawn, in effect. Topps issued the 55-card set in 1962 under the name Attack from Space, and the cards, painted by Norman Saunders from sketches by Wally Wood and Bob Powell, showed Martians burning dogs, boiling people and destroying cities in enough detail that parents complained and the company stopped distribution within months. Surviving sets became collectors' items and the property Burton adapted.

Yes. The film's premise is that they are a species that happens to look like clowns, and a character speculates that Earth's clowns were inspired by earlier visits; they arrive in a spacecraft disguised as a circus big top, breathe our air and go home when it lifts off. Nothing in the film explains where they are from, and the Chiodo brothers have said they preferred it that way.

Shoot the nose. Bullets anywhere else do nothing, but a hit on the red nose makes the Klown spin, deflate and die, a rule the film establishes with a police revolver and confirms on the giant Klownzilla in the finale, which a dying man pierces with a police badge. The nose is the only vulnerable point and the film's one piece of biology.

Not a film, after decades of announcements. A sequel has been promised since the 1990s and the Chiodos have described several scripts, none produced. What did arrive was a game, Killer Klowns from Outer Space: The Game, released in June 2024, an asymmetric multiplayer title in which three Klowns hunt seven residents of Crescent Cove with the film's weapons.

Mostly one word in chorus, the name of the claw that hangs above them, spoken in awe. They are squeaky toys in a claw machine at Pizza Planet who have built a religion around the crane: the claw chooses who goes and who stays, and a toy the claw lifts has been chosen for a better place. Their other line, delivered to Mr. Potato Head in the second film after he saves them, is that they are eternally grateful, and they say it for the rest of the series.

Because they are toys designed to look like aliens, and the toymaker gave them the child's-drawing version: green skin, a single antenna, a blue jumpsuit with a rocket on it and three eyes in a row. Pixar's designers wanted an alien a five-year-old could draw, and the three eyes are what make the silhouette; the film treats the design as a Pizza Planet product line.

By operating a claw. In the 2010 film Woody and the others are sliding into an incinerator at the dump when a giant crane lifts them out; its operators are the three aliens, who had disappeared minutes earlier, drawn to the crane as they are drawn to any claw, and who use the object of their faith to repay Mr. Potato Head's rescue from the first sequel. It is the series' longest-delayed joke.

They meant to. When Han, Luke, Chewbacca and R2-D2 are captured in Return of the Jedi, the Ewoks tie them to spits over a fire to be cooked in honour of C-3PO, whom they have taken for a god, and only 3PO's levitation, arranged by Luke, spares the meal. The film never says what the Ewoks ate after the battle, and fans have assumed the worst about the stormtroopers ever since.

From Wookiee, roughly turned inside out, and from the Miwok, the Native people of the Marin County and Sierra foothill country where the Endor scenes were shot among the redwoods. George Lucas had planned to have Wookiees fight the Empire on the forest moon, decided Chewbacca had made them too technical, and shrank them into a new species whose name kept the sound.

About a metre. The Ewok performers in 1983 were a company of little people led by Warwick Davis, then eleven years old, who was cast as Wicket when Kenny Baker fell ill on the day of shooting; Davis has played Wicket in every live-action appearance since, including The Rise of Skywalker in 2019, where his son Harrison played Wicket's son.

A Gungan, one of the amphibious natives of Naboo who live in underwater cities and share the planet, uneasily, with its human colonists. Gungans are tall, long-limbed, with duck-like bills, eyes on stalks and long ears called haillu, and Jar Jar, exiled from his city for clumsiness, is the first one the audience meets in The Phantom Menace.

Not in anything Lucasfilm has released. The theory, posted to Reddit in 2015, argued that Jar Jar was written as a secret Sith master whose clumsiness was a disguise, and that the plan was abandoned after the backlash to the 1999 film; it cites his acrobatics, his unlikely luck and his role in handing Palpatine emergency powers. Ahmed Best has said he liked the theory. The films and series treat Jar Jar as exactly what he appears to be.

He was the target of the most intense backlash any Star Wars performer had received, much of it racial, and said in 2018 that it had driven him close to suicide. He continued to voice Jar Jar in the prequels and The Clone Wars, returned to the franchise in 2023 as the Jedi Kelleran Beq in The Mandalorian, and has been received at conventions since with the reception he should have had in 1999.

A Bug, one of a race of giant insectoid predators that the film describes as a galactic pest, eating everything and moving on. Edgar is the name of the farmer whose skin the Bug wears after crashing on his farm, and the Bug's real form, revealed at the end, is a cockroach the size of a truck. Vincent D'Onofrio played the skin as a body being worn badly.

A marble. The Arquillian prince Rosenberg, murdered by the Bug, was hiding an entire galaxy inside a bauble hung on the collar of his cat, Orion, and the dying words about the belt sent Agents J and K to the constellation before they understood. The Arquillians threaten to destroy Earth rather than let the Bug have it, and the marble ends the film in a bag with a hundred others, being played by a larger species.

Figures from UFO folklore since 1953, when Albert Bender, who ran a saucer club in Connecticut, said three men in dark suits had visited him and warned him off the subject. Gray Barker's 1956 book made them a legend, John Keel's 1970s writing made them uncanny, and witnesses have described dark-suited, oddly behaved visitors ever since. The comic book the film is based on took the name and reversed the role.

Pound, Bang, Bupkus, Blanko and Nawt, the five Nerdlucks who become the Monstars after stealing talent; Pound is the orange leader, Bang the green one, Bupkus the purple, Blanko the tall blue one and Nawt the small red one. Their boss, Mr. Swackhammer, the owner of the Moron Mountain amusement park, was voiced by Danny DeVito.

Charles Barkley, Patrick Ewing, Muggsy Bogues, Larry Johnson and Shawn Bradley, all playing themselves, who lose their ability overnight during the 1995–96 season and spend the film being examined by doctors and, in Barkley's case, losing a pickup game to a teenager. The talent is drained into a basketball and returned at the end when the Monstars are beaten.

Because the film grew out of his Nike commercials with Bugs Bunny, made in 1992 and 1993, and because he had retired from basketball in October 1993 to play minor-league baseball, which the film uses as its premise: the Looney Tunes pull him down a golf hole to coach them because he is the one great player the Nerdlucks did not think to rob. He returned to the NBA in March 1995, while the film was in production.

The Martians of Sesame Street, a pair of shaggy aliens, one pink and one blue, with bulging eyes, a wide flapping mouth and antennae, who arrive on Earth to identify an ordinary object, consult a book, guess wrong, and leave. Their name is the noise they make, and the show has never given them another one.

In 1971, in the show's third season, in a sketch in which they encounter a telephone, decide it is a cow, then a cat, and are terrified when it rings. Jim Henson and Jerry Nelson performed them in the original sketches, and the pair have returned in new segments, in the show's fiftieth-anniversary material and across the Muppet productions ever since.

Since 1999, yes. Muppets from Space revealed that Gonzo, whose species had been a running question since the 1970s, is an alien whose family arrives in a ship to take him home; he chooses Earth. The film was Jim Henson Productions' answer to a question the Muppets had asked as a joke for twenty years, and the Yip Yips, the company's other aliens, do not appear in it.

The book is a cookbook. The Kanamits arrive with a volume in their language whose title, decoded, reads To Serve Man, and the humans take it as a promise of service; while the code-breaker Michael Chambers is boarding a Kanamit ship for a tour of their planet, his colleague Patty finishes translating the text and runs to the ramp to tell him the truth. He is pushed aboard, and the episode ends with him being fed.

Nine feet in the 1962 broadcast, where Richard Kiel, seven foot two, played them in a bald, domed headpiece and robes and was raised by camera angles; in Damon Knight's original story they are pig-snouted, three-fingered and about the same height. The television Kanamits speak by telepathy, with a voice supplied by Joseph Ruskin, and the show's makeup gave them large heads, small features and no expression.

On a short story. Damon Knight published "To Serve Man" in Galaxy Science Fiction in November 1950, a decade before Rod Serling adapted it for the third season of The Twilight Zone; the episode aired on March 2, 1962. Knight's story has the same twist and a grimmer narrator, who is already aboard and being fattened when he tells it.

A Flora colossus, a species of sentient, tree-like beings from Planet X, the capital of a branch-worlds federation in the comics. Flora colossi are dense-wooded, immensely strong, able to grow and reshape their limbs, and long-lived, and the comics give them a rigid caste system and a monarch; Groot's title in some tellings is Monarch of Planet X, in others he is an exile.

Because his larynx is wood. The comics explain that Flora colossi speak a rich language whose sounds are compressed by their stiff vocal organs into what other species hear as the same three words; the meaning is in the inflection, and Rocket, who has spent years with him, can translate. In the films, James Gunn wrote out every line Groot is actually saying and gave the script to Vin Diesel, who recorded the three words each time with the intended meaning.

Not according to the director. Groot dies in the first film, sacrificing himself to shield the team, and a sprig planted from his remains grows into Baby Groot in the second; James Gunn has said the sprig is Groot's son, a new individual with no memory of the first, while the comics treat regrowth from a twig as the same being continued. The films have not settled it, and the character's later teenage and adult forms are the sprig grown up.

The insect-like species that staffs the Galactic Federation, the interstellar government that regards Rick as its most wanted criminal. Gromflomites are green, with compound eyes, mandibles and segmented armour, and they appear as soldiers, bureaucrats, prison guards and, in one case, a freelance assassin; the Federation is not made up only of them, but they are its face.

A Gromflomite assassin who buys a weapon from Rick in a 2015 episode, explains cheerfully that he loves killing and has no code at all, and is squashed by Morty's ship minutes later while trying to murder a gaseous being Morty has decided to save. He had a few lines of screen time and became one of the show's most quoted characters, with a card explaining his services.

By changing the value of its money. In the 2017 season premiere, having been captured and imprisoned, Rick transfers his mind through the Federation's systems, reaches its central computer and sets the value of the Federation credit to zero, then to one, then to zero again; the economy collapses in a day, the occupation of Earth ends as the soldiers walk off the job, and the Federation is gone until a later season revives a remnant.

An alien species whose true body is a gemstone. Each Gem projects a humanoid form of hard light from the stone, which is set somewhere on that form, in Garnet's palms, Pearl's forehead, Amethyst's chest; when the form is damaged the Gem retreats into the stone to regenerate, and only a broken or shattered stone is death. They do not age, eat or sleep unless they choose to, and they are made rather than born.

In Kindergartens. Homeworld's injectors drill into a planet's crust and seed it with gem embryos that draw the life out of the surrounding rock and soil as they grow, emerging fully formed and assigned to a role; a planet used this way is left dead. Earth's Kindergartens, in a canyon the Crystal Gems guard, were shut down by the rebellion, and Amethyst, who emerged from one late, is the only Gem in the series made on Earth.

The rulers of Homeworld, the Great Diamond Authority: White, Yellow and Blue Diamond, and Pink, the youngest, who was given Earth as a colony, fell in love with it, staged a rebellion against herself under the name Rose Quartz and faked her own shattering to end the war. Steven is her son, carrying her gem, which is what the show's final seasons are about.

A small, round, furred animal from the Star Trek universe, with no visible face or limbs, that purrs when stroked, eats constantly and breeds constantly; the episode that introduced it has the Enterprise overrun within three days from a single specimen. They calm humans, who cannot resist them, and scream at Klingons, whom they cannot stand, which makes them the galaxy's best spy detector.

The episode never says, and the franchise has treated it as instinct: a tribble shrieks and thrashes in the presence of a Klingon, or of a Klingon surgically altered to look human, which is how Kirk exposes the saboteur Arne Darvin. The feeling is mutual. The Klingons, a later episode reveals, regarded tribbles as an ecological menace and hunted the species to near extinction.

Nearly. David Gerrold's script resembled the flat cats of Robert Heinlein's 1952 novel The Rolling Stones, small purring creatures that breed until they fill a spaceship, and the studio's lawyers asked Heinlein for a waiver before the episode aired. He gave it, asking only for a copy of the script, and later said he had borrowed the idea himself from a 1905 story about a rabbit plague.

A mutant is born with the X-gene and manifests powers, usually at puberty, without any outside cause; a mutate is an ordinary human altered by an accident or experiment after birth. The X-Men are mutants; Spider-Man, the Fantastic Four and the Hulk are mutates. The distinction was made explicit in the comics' letter columns in the 1960s and has been the basis of the mutants' separate legal and social status ever since.

No. Every human carries dozens of new mutations, and populations differ in real inherited traits like lactase persistence and the CCR5 variant that resists HIV, but no single gene confers a suite of powers, no mutation produces a new species in one generation, and "superior" is a value, not a biological category. The term is Magneto's, from 1963, and the comics use it as a warning about what he believes.

From the Celestials, in the comics' current account: cosmic beings who experimented on early humanity and left a latent gene that would express itself as the species developed. The 1960s stories blamed atomic radiation, which is why the first X-Men were called the children of the atom. The films have used the vaguer "next stage in human evolution," which is what Professor Xavier says on page one of issue one.

No. Peter Parker was an ordinary teenager until a radioactive spider bit him at a science exhibit in Amazing Fantasy #15 (1962); in Marvel's terms that makes him a mutate, a human altered after birth, rather than a mutant born with the X-gene. The distinction keeps him out of the X-Men's politics, and the comics have reaffirmed it whenever a story tried to blur it.

Because radiation was the decade's magic. Between 1961 and 1964 Stan Lee and his artists gave the Fantastic Four cosmic rays, the Hulk a gamma bomb, Spider-Man a radioactive spider, Daredevil a radioactive isotope and the X-Men parents exposed to fallout; the atomic age had made radiation the one invisible force every reader had heard of and no reader understood, which is exactly what an origin story needs.

No. A spider carrying enough radiation to matter would be dead, and the dose it could deliver in a bite would be trivial; radiation damages DNA at random, which produces cell death, cancer and birth defects, not new abilities. The 2002 film quietly replaced the radioactive spider with a genetically engineered one, which is fiction of a different kind but not a different answer.

It breaks DNA. Gamma rays are high-energy photons that pass through tissue and knock electrons loose as they go, damaging the molecules they hit at random; a small dose raises the lifetime risk of cancer, a large one kills the fast-dividing cells of the marrow and gut and causes acute radiation syndrome, which is fatal within weeks above a few thousand millisieverts. A dose the size of a bomb's would kill a person standing where Banner stood in minutes to days. Nothing about it makes anyone larger.

At a desert test site in New Mexico, in The Incredible Hulk #1 (May 1962), where Banner had built a gamma bomb for the Army and ran onto the range to save a teenager, Rick Jones, who had driven onto it on a dare. The comics never name the base; the 2008 film moved the accident to a university laboratory, and the 2003 film to a lab in Berkeley. The real gamma bombs of the era were tested at Trinity, in 1945, and at the Nevada Test Site through the 1950s.

No, a mutate: a human altered after birth by an outside cause, in Marvel's vocabulary, rather than a mutant born with the X-gene. The Hulk, Spider-Man and the Fantastic Four are the founding mutates of the 1960s; the X-Men are the mutants. Later comics gave Banner a latent factor that the gamma rays activated, which explains why others exposed to the same radiation die, but it is still a factor, not a gene.

Depends on the version. In the 1984 comic a canister fell off a truck and bounced into a storm drain, and its origin was a joke about Daredevil; the 1987 cartoon had it made by the Shredder and the alien Krang; the 2003 series traced it to TCRI, a company run by aliens called Utroms who were building a way home; Mutant Mayhem (2023) had a human scientist, Baxter Stockman, brew it in a lab. The comics later adopted the Utrom origin, so the current canonical answer is aliens.

No, though the 2014 film's writers were reported to have considered it, and the reaction was loud enough that they abandoned the idea. The Turtles are ordinary pet-shop terrapins mutated by the ooze; in most versions the ooze itself is alien in origin, so the Turtles are Earth animals transformed by alien technology, which is a different thing.

Two answers. In the original comic Splinter was the pet rat of a ninja named Hamato Yoshi, who learned to mimic his master's training by watching and was mutated with the Turtles into a rat with a man's mind. In the 1987 cartoon and several later versions, Splinter is Yoshi himself, transformed into a rat by the mutagen because rats were the last animals he touched. Either way the rat came first and the ninja was learned.

Both, in the original. The 1954 film's palaeontologist explains Godzilla as a surviving member of a marine dinosaur lineage, disturbed from the deep sea and mutated by hydrogen bomb tests, which gave it its size and its radioactive breath; Godzilla Minus One (2023) keeps that account. The American Monsterverse films made Godzilla an ancient species that feeds on radiation rather than one created by it, which is a different animal with the same name.

"Strange beast" in Japanese, and by extension the giant-monster genre Toho created with Gojira in 1954. Godzilla, Mothra, Rodan and King Ghidorah are the classic kaiju; the word entered English through fans of the films and was adopted by Pacific Rim (2013) for its own monsters. A film in the genre is a kaiju eiga, a monster film.

Because of a fishing boat. On March 1, 1954 the American Castle Bravo hydrogen bomb test in the Marshall Islands showered the Japanese tuna boat Lucky Dragon 5 with fallout; the crew sickened, the radio operator died in September, and Japan, nine years after Hiroshima, was gripped by fear of contaminated fish. Producer Tomoyuki Tanaka conceived Godzilla that spring as the bomb given a body, and Gojira opened on November 3.

The Forced Evolutionary Virus, a pre-war military project by the contractor West Tek that was meant to make soldiers immune to disease and radiation by rewriting their DNA. It escaped its purpose after the bombs: the Master dipped captives in FEV vats at the Mariposa Military Base in the first game to build his army of super mutants, and the Institute in Fallout 4 made its own strain. Every super mutant is a human, or occasionally another creature, that FEV remade.

Yes. A ghoul is a human who was exposed to a dose of radiation that should have killed them and instead left them alive, hairless, with peeling skin and a lifespan of centuries, healed rather than harmed by further exposure; the games call it ghoulification and the television series showed it as a slow change. Those who lose their minds become feral. Real radiation does the first part, the killing, and none of the rest.

Because FEV rewrites the whole body except its reproductive cells, which it destroys; the Master discovered this in the first game, and it is the flaw that undoes his plan to replace humanity, since a race that cannot breed needs a permanent supply of humans to dip. The Institute's strain has the same limit. The rule makes the super mutants a manufactured species, like the Xenomorph or the Borg, rather than a new one.

No. The exclusion zone around the Chernobyl plant, evacuated in 1986, has become one of Europe's largest wildlife reserves, with wolves, lynx, moose, boar and a herd of Przewalski's horses, and studies of them find shorter lives and more genetic damage, not new shapes. The games' creatures come from the Strugatsky brothers' novel and the developers' imagination, and their real setting, Pripyat and the plant, is drawn from photographs and visits.

A new species of humans, Homo novus, born after the war from mutated survivors: tall, dark-skinned, telepathic, and trying to make contact with the people of the Moscow Metro, who perceive their attempts as psychic attacks and fear them as the greatest threat in the tunnels. The novel and the game turn on the hero's discovery, too late in most endings, that they came in peace.

On the novel and on Andrei Tarkovsky's 1979 film Stalker, which adapted it. Arkady and Boris Strugatsky's 1972 novel invented the Zone, the stalkers who enter it illegally for artifacts and the anomalies that kill them; the film moved it to a ruined industrial landscape; the 2007 game moved it to the real Chernobyl exclusion zone and kept the name of the profession, spelled with dots.

Leslie Kean's UFOs: Generals, Pilots, and Government Officials Go on the Record (2010). It is sober, sourced, and built on first-hand testimony from people with nothing to gain, and it is the book that led directly to the 2017 New York Times story that reopened the subject. Follow it with Garrett Graff's UFO for the full government history.

Yes. J. Allen Hynek was an astronomer and the Air Force's consultant for Project Blue Book; his The UFO Experience is the classic. Jacques Vallée is a computer scientist and astronomer. Among skeptics, Carl Sagan's The Demon-Haunted World covers the subject at length. For the science of alien life itself, see our astrobiology reading list.

Garrett Graff's UFO (2023) for the history up to the congressional hearings, Luis Elizondo's Imminent (2024) for the insider account of AATIP, and Ross Coulthart's In Plain Sight (2021) for the journalist's version. Read them together; they disagree in useful ways.

John G. Fuller's The Interrupted Journey (1966), the account of Betty and Barney Hill's 1961 experience built from their hypnosis sessions. It established nearly every element later books would repeat: missing time, the medical examination, the star map.

Whitley Strieber presents it as a truthful account of his own experiences and has never called it fiction, though he is a horror novelist by trade and has said he does not know what the "visitors" are. The book's cover painting is the source of the modern Grey alien image.

Susan Clancy's Abducted (2005), a Harvard psychologist's study of why people come to believe they were taken, and David Hufford's The Terror That Comes in the Night (1982) on sleep paralysis, which explains the bedroom-visitor experience without explaining it away.

Stephen Webb's If the Universe Is Teeming with Aliens… Where Is Everybody?, whose second edition (2015) walks through seventy-five proposed solutions one by one. For a shorter, more opinionated take, Adam Frank's The Little Book of Aliens (2023).

Lisa Kaltenegger's Alien Earths (2024) for exoplanets and biosignatures, and Sarah Scoles's Making Contact (2017) for SETI through the career of Jill Tarter. Between them they cover both halves of the modern search.

Yes, with the understanding that its central claim, that the interstellar object ʻOumuamua was likely an alien artifact, is rejected by most astronomers. It is a clear, provocative statement of a minority view by a serious scientist, and it explains the evidence well enough for you to judge.

For most readers, Carl Sagan's Contact (1985): a scientist's idea of how a message would arrive and what humanity would do with it. For a stranger and more demanding answer, Stanisław Lem's Solaris (1961) or Peter Watts's Blindsight (2006).

Project Hail Mary (Andy Weir, 2021) is fast, funny, and built around the most likable alien in recent fiction. Ender's Game (1985) and The War of the Worlds (1898) are short and immediately gripping. Children of Time (2015) rewards a little more patience.

Yes. Liu Cixin's trilogy is about Earth's first contact with a civilization from the unstable Alpha Centauri system and the consequences over centuries. Its second volume gives the "dark forest" explanation of the Fermi paradox its name.

Erich von Däniken's Chariots of the Gods? (1968), which sold tens of millions of copies and launched the whole genre. Zecharia Sitchin's The 12th Planet (1976) is the second pillar, and the source of the Anunnaki-as-aliens idea.

Several. Kenneth Feder's Frauds, Myths, and Mysteries is the standard archaeology-classroom text; Jason Colavito's The Cult of Alien Gods traces where the ideas came from; and Ronald Story's The Space Gods Revealed (1976) answered von Däniken point by point when the book was new.

Carl Sagan's The Demon-Haunted World (1995) is the classic on how to think about extraordinary claims, with long sections on UFOs and abductions. For the modern video-era cases, Mick West's Escaping the Rabbit Hole (2018) is the practical guide.

Yes, and they are the best ones. Sarah Scoles's They Are Already Here spends its time with believers and takes them seriously as people; Greg Eghigian's After the Flying Saucers Came treats the phenomenon as history worth understanding; David Hufford's The Terror That Comes in the Night insists the experiences are real even where the explanation is not alien.