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

Lex Fridman Podcast

Conversations that explore technology, history, philosophy, physics, mathematics, biology, chemistry, engineering, AI, robotics, programming, music, film, art, sports, psychology, neuroscience, geopolitics, business, economics, religion, astronomy, and the human condition with people from all walks of life.

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

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: <a href="https://lexfridman.com/sponsors/ep468-sc">https://lexfridman.com/sponsors/ep468-sc</a> 
See below for timestamps, transcript, and to give feedback, submit questions, contact Lex, etc.
Transcript: 
<a href="https://lexfridman.com/janna-levin-transcript">https://lexfridman.com/janna-levin-transcript</a>
CONTACT LEX: 
Feedback – give feedback to Lex: <a href="https://lexfridman.com/survey">https://lexfridman.com/survey</a> 
AMA – submit questions, videos or call-in: <a href="https://lexfridman.com/ama">https://lexfridman.com/ama</a> 
Hiring – join our team: <a href="https://lexfridman.com/hiring">https://lexfridman.com/hiring</a> 
Other – other ways to get in touch: <a href="https://lexfridman.com/contact">https://lexfridman.com/contact</a>
EPISODE LINKS: 
Janna’s X: <a href="https://x.com/JannaLevin">https://x.com/JannaLevin</a> 
Janna’s Website: <a href="https://jannalevin.com">https://jannalevin.com</a> 
Janna’s Instagram: <a href="https://instagram.com/jannalevin">https://instagram.com/jannalevin</a> 
Janna’s Substack: <a href="https://substack.com/@jannalevin">https://substack.com/@jannalevin</a> 
Black Hole Survival Guide (book): <a href="https://amzn.to/3YkJzT5">https://amzn.to/3YkJzT5</a> 
Black Hole Blues (book): <a href="https://amzn.to/42Nw7IE">https://amzn.to/42Nw7IE</a> 
How the Universe Got Its Spots (book): <a href="https://amzn.to/4m5De8k">https://amzn.to/4m5De8k</a> 
A Madman Dreams of Turing Machines (book): <a href="https://amzn.to/3GGakvd">https://amzn.to/3GGakvd</a>
SPONSORS: 
To support this podcast, check out our sponsors & get discounts: 
Brain.fm: Music for focus. 
Go to <a href="https://lexfridman.com/s/brainfm-ep468-sc">https://brain.fm/lex</a> 
BetterHelp: Online therapy and counseling. 
Go to <a href="https://lexfridman.com/s/betterhelp-ep468-sc">https://betterhelp.com/lex</a> 
NetSuite: Business management software. 
Go to <a href="https://lexfridman.com/s/netsuite-ep468-sc">http://netsuite.com/lex</a> 
Shopify: Sell stuff online. 
Go to <a href="https://lexfridman.com/s/shopify-ep468-sc">https://shopify.com/lex</a> 
AG1: All-in-one daily nutrition drink. 
Go to <a href="https://lexfridman.com/s/ag1-ep468-sc">https://drinkag1.com/lex</a>
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: <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> 
– Podcast Playlist: <a href="https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4">https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4</a> 
– Clips Channel: <a href="https://www.youtube.com/lexclips">https://www.youtube.com/lexclips</a>

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

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