In Theory with Janna Levin

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If something is possible, has the universe tried it? Are all physical possibilities inevitable? Neil deGrasse Tyson sits down with theoretical astrophysicist Janna Levin to launch “In Theory,” a new StarTalk series celebrating the weird, wacky theories of the universe and the theorists who chase them. Out on YouTube October 29, 2026! NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/in-theory-with-janna-levin/ Thanks to our Patrons…