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:&nbsp;https://startalkmedia.com/show/in-theory-with-janna-levin/Thanks to our Patrons Elamar, Natalia Nelicheva, Kyron Laskosky, Stanley Tai, Jan, Chris Tringali, Nikki Tea, Jay Kapadia, Sean Moran, SnakeSurfer, Roddie, Sam Sillmon, Graham West, Ben Fisk, ChexVC, aitor clemente ramos, Max Forkel, George Fox, and HKRDiary for supporting us this week.
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