Originally posted by
The billions and billions theory is a hoax. No aliens will be discovered in my lifetime - but the Pollyannas will persist.
Mathematically... given how many galaxies are out there, how many stars, how many planets, how many moons, etc. billions and billions of forms of non-terrestrial life seems downright conservative.
But it is pretty unlikely we will discover anything more highly advanced than bacteria in our own solar system, and it's even more unlikely that we will get outside our solar system in the next century.