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#433 – Sara Walker: Physics of Life, Time, Complexity, and Aliens

Lex Fridman Podcast

Conversations about science, technology, history, philosophy and the nature of intelligence, consciousness, love, and power. Lex is an AI researcher at MIT and beyond.

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:
- Notion: https://notion.com/lex
- Motific: https://motific.ai
- Shopify: https://shopify.com/lex to get $1 per month trial
- BetterHelp: https://betterhelp.com/lex to get 10% off
- AG1: https://drinkag1.com/lex to get 1 month supply of fish oil

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
RSS: https://lexfridman.com/feed/podcast/
YouTube Full Episodes: https://youtube.com/lexfridman
YouTube Clips: https://youtube.com/lexclips

SUPPORT & CONNECT:
- Check out the sponsors above, it's the best way to support this podcast
- Support on Patreon: https://www.patreon.com/lexfridman
- Twitter: https://twitter.com/lexfridman
- Instagram: https://www.instagram.com/lexfridman
- LinkedIn: https://www.linkedin.com/in/lexfridman
- Facebook: https://www.facebook.com/lexfridman
- Medium: https://medium.com/@lexfridman

OUTLINE:
Here's the timestamps for the episode. On some podcast players you should be able to click the timestamp to jump to that time.
(00:00) - Introduction
(10:40) - Definition of life
(31:18) - Time and space
(42:00) - Technosphere
(46:25) - Theory of everything
(55:06) - Origin of life
(1:16:44) - Assembly theory
(1:32:58) - Aliens
(1:44:48) - Great Perceptual Filter
(1:48:45) - Fashion
(1:52:47) - Beauty
(1:59:08) - Language
(2:05:50) - Computation
(2:15:37) - Consciousness
(2:24:28) - Artificial life
(2:48:21) - Free will
(2:55:05) - Why anything exists

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: 
– Notion: <a href="https://notion.com/lex">https://notion.com/lex</a> 
– Motific: <a href="https://motific.ai">https://motific.ai</a> 
– Shopify: <a href="https://shopify.com/lex">https://shopify.com/lex</a> to get $1 per month trial 
– BetterHelp: <a href="https://betterhelp.com/lex">https://betterhelp.com/lex</a> to get 10% off 
– AG1: <a href="https://drinkag1.com/lex">https://drinkag1.com/lex</a> to get 1 month supply of fish oil
Transcript: <a href="https://lexfridman.com/sara-walker-3-transcript">https://lexfridman.com/sara-walker-3-transcript</a>
EPISODE LINKS: 
Sara’s Book – Life as No One Knows It: <a href="https://amzn.to/3wVmOe1">https://amzn.to/3wVmOe1</a> 
Sara’s X: <a href="https://x.com/Sara_Imari">https://x.com/Sara_Imari</a> 
Sara’s Instagram: <a href="https://instagram.com/alien_matter">https://instagram.com/alien_matter</a>
PODCAST INFO: 
Podcast website: <a href="https://lexfridman.com/podcast">https://lexfridman.com/podcast</a> 
Apple Podcasts: <a href="https://apple.co/2lwqZIr">https://apple.co/2lwqZIr</a> 
Spotify: <a href="https://spoti.fi/2nEwCF8">https://spoti.fi/2nEwCF8</a> 
RSS: <a href="https://lexfridman.com/feed/podcast/">https://lexfridman.com/feed/podcast/</a> 
YouTube Full Episodes: <a href="https://youtube.com/lexfridman">https://youtube.com/lexfridman</a> 
YouTube Clips: <a href="https://youtube.com/lexclips">https://youtube.com/lexclips</a>
SUPPORT & CONNECT: 
– Check out the sponsors above, it’s the best way to support this podcast 
– Support on Patreon: <a href="https://www.patreon.com/lexfridman">https://www.patreon.com/lexfridman</a> 
– Twitter: <a href="https://twitter.com/lexfridman">https://twitter.com/lexfridman</a> 
– Instagram: <a href="https://www.instagram.com/lexfridman">https://www.instagram.com/lexfridman</a> 
– LinkedIn: <a href="https://www.linkedin.com/in/lexfridman">https://www.linkedin.com/in/lexfridman</a> 
– Facebook: <a href="https://www.facebook.com/lexfridman">https://www.facebook.com/lexfridman</a> 
– Medium: <a href="https://medium.com/@lexfridman">https://medium.com/@lexfridman</a>
OUTLINE: 
Here’s the timestamps for the episode. On some podcast players you should be able to click the timestamp to jump to that time. 
(00:00) – Introduction 
(10:40) – Definition of life 
(31:18) – Time and space 
(42:00) – Technosphere 
(46:25) – Theory of everything 
(55:06) – Origin of life 
(1:16:44) – Assembly theory 
(1:32:58) – Aliens 
(1:44:48) – Great Perceptual Filter 
(1:48:45) – Fashion 
(1:52:47) – Beauty 
(1:59:08) – Language 
(2:05:50) – Computation 
(2:15:37) – Consciousness 
(2:24:28) – Artificial life 
(2:48:21) – Free will 
(2:55:05) – Why anything exists

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#433 – Sara Walker: Physics of Life, Time, Complexity, and Aliens

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