Sara Walker: Physics of Life, Time, Complexity, and Aliens | Lex Fridman Podcast #433

Sara Walker is an astrobiologist and theoretical physicist. She is the author of a new book titled “Life as No One Knows It: The Physics of Life’s Emergence”. Please support this podcast by checking out our sponsors:
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TRANSCRIPT:
https://lexfridman.com/sara-walker-3-transcript

EPISODE LINKS:
Sara’s Book – Life as No One Knows It: https://amzn.to/3wVmOe1
Sara’s X: https://x.com/Sara_Imari
Sara’s Instagram: https://instagram.com/alien_matter

PODCAST INFO:
Podcast website: https://lexfridman.com/podcast
Apple Podcasts: https://apple.co/2lwqZIr
Spotify: https://spoti.fi/2nEwCF8
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Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4
Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41

OUTLINE:
0:00 – Introduction
1:07 – Definition of life
21:45 – Time and space
32:26 – Technosphere
36:51 – Theory of everything
45:32 – Origin of life
1:07:10 – Assembly theory
1:23:24 – Aliens
1:35:14 – Great Perceptual Filter
1:39:12 – Fashion
1:43:14 – Beauty
1:49:35 – Language
1:56:16 – Computation
2:06:03 – Consciousness
2:14:55 – Artificial life
2:38:48 – Free will
2:45:32 – Why anything exists

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