Lex Fridman Podcast
#455 – Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life
Adam Frank
We were actually a water world, you know, with just a couple of Australia-sized planets. cratons, they called them, protocontinents. So those, we went through these snowball earth phases. And if it wasn't for the fact that we had kind of an active plate tectonics, which had a lot of volcanism on it, we could have been locked in that forever.
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