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