Neil deGrasse Tyson on Aliens, Intelligence & the Unknown | Nerd Exchange Ep. 2
13:24and it spread across the galaxy but then evolved in place so that you'd have a basic humanoid form I think that's how they got around that but uh29:08to populate every single planet in the galaxy and you run the numbers on that uh29:36add up all the time that that would require okay and it's a fraction the age of the universe a fraction the age of the galaxy














