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