A theory on why we don't see more life (much less alien civilizations) argues that life might arise easily, but go extinct within a billion years of planetary formation.
The post Where Are All the Aliens? Maybe They’re Mostly Microbial (and Dead) appeared first on ExtremeTech.
from
https://www.extremetech.com/extreme/221784-where-are-all-the-aliens-maybe-theyre-mostly-microbial-and-dead