Lex Fridman Podcast
#455 – Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life
Adam Frank
There's a bunch of different things. One is that, you know, the Earth went through a couple of phases of being a snowball planet. Like, you know, we went into a period of glaciation where pretty much the entire planet was under ice. The oceans were frozen. You know, early on in Earth history, there was barely any land.
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