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Lex Fridman Podcast

#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions

2025-05-05 · 187 min · 21 entities

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Janna Levin is a theoretical physicist and cosmologist specializing in black holes, cosmology of extra dimensions, topology of the universe, and gravitational waves. Thank you for listening ❤ Check out our sponsors: https://lexfridman.com/sponsors/ep468-sc See below for timestamps, transcript, and to give feedback, submit questions, contact Lex, etc. Transcript: https://lexfridman.com/janna-levin-transcript CONTACT LEX: Feedback – give feedback to Lex: https://lexfridman.com/survey AMA – submit questions, videos or call-in: https://lexfridman.com/ama Hiring – join our team: https://lexfridman.com/hiring Other – other ways to get in touch: https://lexfridman.com/contact EPISODE LINKS: Janna’s X: https://x.com/JannaLevin Janna’s Website: https://jannalevin.com Janna’s Instagram: https://instagram.com/jannalevin Janna’s Substack: https://substack.com/@jannalevin Black Hole Survival Guide (book): https://amzn.to/3YkJzT5 Black Hole Blues (book): https://amzn.to/42Nw7IE How the Universe Got Its Spots (book): https://amzn.to/4m5De8k A Madman Dreams of Turing Machines (book): https://amzn.to/3GGakvd SPONSORS: To support this podcast, check out our sponsors & get discounts: Brain.fm: Music for focus. Go to https://brain.fm/lex BetterHelp: Online therapy and counseling. Go to https://betterhelp.com/lex NetSuite: Business management software. Go to http://netsuite.com/lex Shopify: Sell stuff online. Go to https://shopify.com/lex AG1: All-in-one daily nutrition drink. Go to https://drinkag1.com/lex OUTLINE: (00:00) – Introduction (00:51) – Sponsors, Comments, and Reflections (09:21) – Black holes (16:55) – Formation of black holes (27:45) – Oppenheimer and the Atomic Bomb (34:08) – Inside the black hole (47:10) – Supermassive black holes (50:39) – Physics of spacetime (53:42) – General relativity (59:13) – Gravity (1:15:47) – Information paradox (1:24:17) – Fuzzballs & soft hair (1:27:28) – ER = EPR (1:34:07) – Firewall (1:42:59) – Extra dimensions (1:45:24) – Aliens (2:01:00) – Wormholes (2:11:57) – Dark matter and dark energy (2:22:00) – Gravitational waves (2:34:08) – Alan Turing and Kurt Godel (2:46:23) – Grigori Perelman, Andrew Wiles, and Terence Tao (2:52:58) – Art and science (3:02:37) – The biggest mystery PODCAST LINKS: – Podcast Website: https://lexfridman.com/podcast – Apple Podcasts: https://apple.co/2lwqZIr – Spotify: https://spoti.fi/2nEwCF8 – RSS: https://lexfridman.com/feed/podcast/ – Podcast Playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4 – Clips Channel: https://www.youtube.com/lexclips