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Adam Frank: Alien Civilizations and the Search for Extraterrestrial Life | Lex Fridman Podcast #455

… aliens 1:47:14 – Warp drives 1:53:21 – Cryogenics 1:56:39 – What aliens look like 2:05:24 – Alien contact 2:16:29 – UFO sightings 2:28:14 …