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

6896.357 - 6917.267 Adam Frank

Pollution of all different kinds. And trash also. Okay, so trash is an interesting idea when you come to the actual solar system, right? We are actually, there's a whole other field of techno signatures, which are things in the solar system. What if somebody came by a billion years ago, you know, and left some stuff, right? So the Earth has been showing biosignatures for billions of years.