Lex Fridman PodcastJanna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions | Lex Fridman Podcast #468
Episode Details
EPISODE INFO
- Released
- May 5, 2025
- Duration
- 3h 0m
- Channel
- Lex Fridman Podcast
- Watch on YouTube
- ▶ Open ↗
EPISODE DESCRIPTION
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-sb 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://lexfridman.com/s/brainfm-ep468-sb *BetterHelp:* Online therapy and counseling. Go to https://lexfridman.com/s/betterhelp-ep468-sb *NetSuite:* Business management software. Go to https://lexfridman.com/s/netsuite-ep468-sb *Shopify:* Sell stuff online. Go to https://lexfridman.com/s/shopify-ep468-sb *AG1:* All-in-one daily nutrition drink. Go to https://lexfridman.com/s/ag1-ep468-sb *OUTLINE:* 0:00 - Episode highlight 2:03 - Introduction 3:03 - Black holes 10:37 - Formation of black holes 21:28 - Oppenheimer and the Atomic Bomb 27:50 - Inside the black hole 40:53 - Supermassive black holes 44:22 - Physics of spacetime 47:25 - General relativity 52:56 - Gravity 1:09:29 - Information paradox 1:17:59 - Fuzzballs & soft hair 1:21:10 - ER = EPR 1:27:49 - Firewall 1:36:41 - Extra dimensions 1:39:06 - Aliens 1:54:42 - Wormholes 2:05:40 - Dark matter and dark energy 2:15:43 - Gravitational waves 2:27:51 - Alan Turing and Kurt Godel 2:40:05 - Grigori Perelman, Andrew Wiles, and Terence Tao 2:46:40 - Art and science 2:56:19 - The biggest mystery *PODCAST LINKS:*
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SPEAKERS
Janna Levin
guestLex Fridman
host
EPISODE SUMMARY
In this episode of Lex Fridman Podcast, featuring Janna Levin and Lex Fridman, Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions | Lex Fridman Podcast #468 explores black holes, quantum paradoxes, and how spacetime shapes everything we know Janna Levin and Lex Fridman explore black holes as fundamental spacetime regions rather than dense objects, explaining how they form from collapsing stars and how their collisions generate gravitational waves that LIGO can now detect. They delve into the black hole information paradox, surveying leading ideas that attempt to reconcile general relativity with quantum mechanics, including holography, ER=EPR, fuzzballs, and firewalls. The conversation widens into extra dimensions, wormholes, dark matter and dark energy, and the possibility that gravity itself may be an emergent phenomenon from underlying quantum entanglement. Along the way, they weave in the human stories of Einstein, Oppenheimer, Turing, Gödel, and the LIGO team, emphasizing science as a deeply human, cultural, and sometimes tragic enterprise.
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