#455 – Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life

3515.721 - 3535.466 Adam Frank

When did they come to Earth, right? So if you give civilizations a finite lifetime, let them last 10,000, 100,000 years, what you find is you now have a steady state. Civilizations are dying, they're coming back, they're traveling between the stars. What you find then is you can have big holes opened up. You can have regions of space where there is nobody. For, you know, millions of years.