The Engineers of Prometheus: Who They Are and Why They Made Us

For 33 years the Engineers were one prop. The derelict ship in Alien (1979) holds a giant pilot fused into its chair, an elephantine, trunked figure with its ribcage burst outward; the crew called it the Space Jockey, H.R. Giger built it as a 26-foot set piece, and the film explained nothing about it. Fans assumed the trunk and the chair were a body and read the pilot as a separate species that the Xenomorph had killed. Prometheus (2012), Ridley Scott's return to the story, made the trunked figure a pressure suit and the pilot inside it a pale, hairless, heavily muscled humanoid about three metres tall, and gave the species the name the film's scientists use: the Engineers.

The film's premise is a star map. Archaeologists Elizabeth Shaw and Charlie Holloway find the same cluster of stars in cave paintings and carvings from cultures 35,000 years apart, take it as an invitation, and in 2093 the Weyland Corporation ship Prometheus follows it to the moon LV-223. The temple-like structure there is a military outpost, the Engineers in it died in a catastrophe two millennia earlier, and the one survivor, woken from stasis, tears the head off the android that speaks to him and sets his ship for Earth. Alien: Covenant (2017) showed the species' home world, called Planet 4 in production, and its extermination from the air by that same android, David, using the Engineers' own cargo.

The Engineers are humans scaled up. Their DNA, the film says, is a 100 percent match for ours, which is meant to be read as us descending from them rather than the reverse; they are pale to the point of translucence, hairless, with dark eyes and a physique that the production based on classical statues of athletes. They live, or lived, for millennia in stasis. They are also, on screen, unreadable: the survivor speaks a language the android has learned from proto-Indo-European reconstructions, and his only recorded acts are murder and an attempt to reach Earth. Whether the population on Planet 4 in Covenant, robed and unarmed, represents a different caste or a later era is not resolved.

Their technology is the black liquid, catalogued in tie-in material as Chemical A0-3959X.91-15. Swallowed at the start of Prometheus it dissolves an Engineer into the genetic material that seeds a planet; released in the outpost it mutates worms into serpents, a human into a monster and an embryo into the first stage of what becomes the Xenomorph. It is stored in urns, thousands of them, on ships designed to drop them on populated worlds. The Engineers, in other words, made a substance that creates life and destroys it depending on the dose, and the outpost's crew died when it got loose among them.

The film commits to the first half. The opening shows an Engineer on a bare young world drinking the black liquid, breaking apart at the molecular level and falling into a waterfall, his DNA recombining in the water; the star maps and the DNA match complete the argument that humans are that seeding's outcome. It refuses the second half. The outpost's cargo was being readied for Earth two thousand years before the story, and the reason is left as the question Shaw carries into the sequel, where she does not survive to ask it. Ridley Scott told interviewers that the script once explained it directly, the Engineers having sent a representative who was crucified in Judea, and that the idea was dropped as too on the nose.

Covenant changed the subject. David, the android, lands the surviving Engineer ship over the species' city and empties its urns on the crowd, and the film spends its remaining time on his experiments rather than on theirs. The Engineers, having been made the creators of humanity in one film, are exterminated by humanity's own creation in the next, which is either the point or the franchise losing interest. A third film in this line was planned and not made.

Prometheus is the ancient astronaut theory filmed straight. The star map in cave paintings, the gods who came down and made people, the invitation to come and find them: this is the argument of Erich von Däniken's Chariots of the Gods? (1968) and of Zecharia Sitchin's The Twelfth Planet (1976), which read Sumerian myth as a record of the Anunnaki creating humans as a labor force and later deciding to drown them. The Engineers are the Anunnaki with the Sumerian names filed off and the flood replaced by a bioweapon. The film's scientists even make the theory's characteristic move, treating similarity between distant cultures' art as evidence of a single outside source rather than of people everywhere painting the sky.

The ancient astronaut article lays out why archaeologists reject the premise: the cave paintings that Prometheus stitches together do not exist as described, the star cluster does not correspond to a real one, and human DNA descends by a documented tree from earlier primates rather than from a giant. The Star People traditions of the Americas, which the theory's popularizers also cite, are stories about relationship and origin that their own tellers do not read as accounts of engineering. The film is not making a claim; it is dramatizing one that a large audience already half believes, which is why its opening scene worked and its explanations did not.