Alien civilizations are expanding rapidly | Robin Hanson and Lex Fridman
24:58
UFO sightings explained | Robin Hanson and Lex Fridman
22:03
How many alien civilizations are out there?
59:53
Robin Hanson on Grabby Aliens and When Humanity Will Meet Them
17:40
Universe is full of aliens | Robin Hanson and Lex Fridman
20:50
What If Humanity Is Among The First Spacefaring Civilizations?
28:40
How to communicate with alien civilizations | David Kipping and Lex Fridman
51:23
Mesopotamia - Los sumerios
20:01