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

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<p>Janna Levin is a theoretical physicist and cosmologist specializing in black holes, cosmology of extra dimensions, topology of the universe, and gravitational waves.<br /> Thank you for listening ❤ Check out our sponsors: <a href="https://lexfridman.com/sponsors/ep468-sc">https://lexfridman.com/sponsors/ep468-sc</a><br /> See below for timestamps, transcript, and to give feedback, submit questions, contact Lex, etc.</p> <p><b>Transcript:</b><br /> <a href="https://lexfridman.com/janna-levin-transcript">https://lexfridman.com/janna-levin-transcript</a></p> <p><b>CONTACT LEX:</b><br /> <b>Feedback</b> &#8211; give feedback to Lex: <a href="https://lexfridman.com/survey">https://lexfridman.com/survey</a><br /> <b>AMA</b> &#8211; submit questions, videos or call-in: <a href="https://lexfridman.com/ama">https://lexfridman.com/ama</a><br /> <b>Hiring</b> &#8211; join our team: <a href="https://lexfridman.com/hiring">https://lexfridman.com/hiring</a><br /> <b>Other</b> &#8211; other ways to get in touch: <a href="https://lexfridman.com/contact">https://lexfridman.com/contact</a></p> <p><b>EPISODE LINKS:</b><br /> Janna&#8217;s X: <a href="https://x.com/JannaLevin">https://x.com/JannaLevin</a><br /> Janna&#8217;s Website: <a href="https://jannalevin.com">https://jannalevin.com</a><br /> Janna&#8217;s Instagram: <a href="https://instagram.com/jannalevin">https://instagram.com/jannalevin</a><br /> Janna&#8217;s Substack: <a href="https://substack.com/@jannalevin">https://substack.com/@jannalevin</a><br /> Black Hole Survival Guide (book): <a href="https://amzn.to/3YkJzT5">https://amzn.to/3YkJzT5</a><br /> Black Hole Blues (book): <a href="https://amzn.to/42Nw7IE">https://amzn.to/42Nw7IE</a><br /> How the Universe Got Its Spots (book): <a href="https://amzn.to/4m5De8k">https://amzn.to/4m5De8k</a><br /> A Madman Dreams of Turing Machines (book): <a href="https://amzn.to/3GGakvd">https://amzn.to/3GGakvd</a></p> <p><b>SPONSORS:</b><br /> To support this podcast, check out our sponsors &#38; get discounts:<br /> <b>Brain.fm:</b> Music for focus.<br /> Go to <a href="https://lexfridman.com/s/brainfm-ep468-sc">https://brain.fm/lex</a><br /> <b>BetterHelp:</b> Online therapy and counseling.<br /> Go to <a href="https://lexfridman.com/s/betterhelp-ep468-sc">https://betterhelp.com/lex</a><br /> <b>NetSuite:</b> Business management software.<br /> Go to <a href="https://lexfridman.com/s/netsuite-ep468-sc">http://netsuite.com/lex</a><br /> <b>Shopify:</b> Sell stuff online.<br /> Go to <a href="https://lexfridman.com/s/shopify-ep468-sc">https://shopify.com/lex</a><br /> <b>AG1:</b> All-in-one daily nutrition drink.<br /> Go to <a href="https://lexfridman.com/s/ag1-ep468-sc">https://drinkag1.com/lex</a></p> <p><b>OUTLINE:</b><br /> (00:00) &#8211; Introduction<br /> (00:51) &#8211; Sponsors, Comments, and Reflections<br /> (09:21) &#8211; Black holes<br /> (16:55) &#8211; Formation of black holes<br /> (27:45) &#8211; Oppenheimer and the Atomic Bomb<br /> (34:08) &#8211; Inside the black hole<br /> (47:10) &#8211; Supermassive black holes<br /> (50:39) &#8211; Physics of spacetime<br /> (53:42) &#8211; General relativity<br /> (59:13) &#8211; Gravity<br /> (1:15:47) &#8211; Information paradox<br /> (1:24:17) &#8211; Fuzzballs &#38; soft hair<br /> (1:27:28) &#8211; ER = EPR<br /> (1:34:07) &#8211; Firewall<br /> (1:42:59) &#8211; Extra dimensions<br /> (1:45:24) &#8211; Aliens<br /> (2:01:00) &#8211; Wormholes<br /> (2:11:57) &#8211; Dark matter and dark energy<br /> (2:22:00) &#8211; Gravitational waves<br /> (2:34:08) &#8211; Alan Turing and Kurt Godel<br /> (2:46:23) &#8211; Grigori Perelman, Andrew Wiles, and Terence Tao<br /> (2:52:58) &#8211; Art and science<br /> (3:02:37) &#8211; The biggest mystery</p> <p><b>PODCAST LINKS:</b><br /> &#8211; Podcast Website: <a href="https://lexfridman.com/podcast">https://lexfridman.com/podcast</a><br /> &#8211; Apple Podcasts: <a href="https://apple.co/2lwqZIr">https://apple.co/2lwqZIr</a><br /> &#8211; Spotify: <a href="https://spoti.fi/2nEwCF8">https://spoti.fi/2nEwCF8</a><br /> &#8211; RSS: <a href="https://lexfridman.com/feed/podcast/">https://lexfridman.com/feed/podcast/</a><br /> &#8211; Podcast Playlist: <a href="https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4">https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4</a><br /> &#8211; Clips Channel: <a href="https://www.youtube.com/lexclips">https://www.youtube.com/lexclips</a></p>