Background from the Knowledge Base
The Drake Equation: Calculating the Probability of Alien Life
Learn about the Drake Equation, Frank Drake's formula for estimating the number of communicating alien civilizations in our galaxy, and what modern science says.
Do Aliens Exist? What Science Actually Knows in 2026
Do aliens exist? The honest answer from astronomy, biology and the search so far: how many planets there are, what biosignature claims have held up, why nobody has answered SETI, and what would count as proof.
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