For decades the Fermi Paradox has stipulated that unless life is unique to Earth, it must exist throughout the galaxy. And yet, so far there’s been no word. Hence, paradox. A new theory, based on natural selection, might explain why.
There’s a very good reason we haven’t heard a peep from an alien civilization, and probably never will. I think it has something to do with lewd remarks made to a nuclear superpower. Or something. [SMBC - Thanks, Eric]