Sara Walker: The Origin of Life on Earth and Alien Worlds | Lex Fridman Podcast #198

Sara Walker is an astrobiologist and theoretical physicist interested in the origin of life. Please support this podcast by checking out our sponsors:
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EPISODE LINKS:
Sara’s Twitter: https://twitter.com/Sara_Imari
Sara’s Website: http://emergence.asu.edu/

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Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41

OUTLINE:
0:00 – Introduction
1:53 – Origin of life
9:46 – Did aliens seed life on Earth?
14:57 – What is life?
26:36 – Cellular automata
31:04 – The laws of physics may change with time
40:50 – Nobel Prize for the origin of life
46:09 – Is consciousness fundamental to the universe?
57:28 – Life is the most deterministic part of physics
1:00:03 – Free will
1:08:20 – How to detect alien life
1:22:57 – How many alien civilization are out there?
1:29:41 – Shadow biosphere
1:36:08 – UFO sightings
1:39:43 – Exponential population growth of AI lifeforms
1:46:50 – The role of death in life
1:50:54 – Advice for young people
1:56:40 – Meaning of life

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