# Janna Levin
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Janna J. Levin (born 1967) is an American theoretical cosmologist and a professor of physics and astronomy at Barnard College. She earned a Bachelor of Arts in astronomy and physics with a concentration in philosophy at Barnard College in 1988 and a PhD in theoretical physics at the Massachusetts Institute of Technology in 1993. Much of her work deals with looking for evidence to support the proposal that our universe might be finite in size due to its having a nontrivial topology.
How Does Touch Lead To Pain Or Pleasure?
Pain and pleasure seem like simple facts of life, but they are far from it. Neuroscientists still cannot say why physical pain differs from psychological pain, for instance, nor why a loved one’s touch soothes while a stranger’s touch repels.
To explore the science behind these sensations, Janna Le…
Live from ICM 2026: What Is Math For in the Age of AI?
Mathematicians are witnessing a profound shift in their field. AI systems are now producing proofs, spotting connections between distant fields, and, in a few cases, solving problems that had stumped mathematicians for decades. The pace of progress over the past several months has raised challengin…
#881: Tales of Overcoming The Odds, and How to Turn Losses Into Wins — Tim McGraw, Terry Crews, Dax Shepard, and More
This is a special episode about overcoming mistakes and failure. What do you do when your work is rejected, when the big bet fails, or when the path ahead suddenly disappears? As you’ll hear in this episode, setbacks can often present opportunities, if you know how to look for them.
This episode is…
194. The Infinity Impulse. [MST3K K03. Star Force: Fugitive Alien II.]
![194. The Infinity Impulse. [MST3K K03. Star Force: Fugitive Alien II.]](https://cdn-images-3.listennotes.com/podcasts/its-just-a-show-chris-piuma-and-charlotte-ZHIQNvqJBGK-OyXSp0Fo62K.300x300.jpg)
Star Force: Fugitive Alien II returns, KTMA-style, to send Chris and Charlotte into black holes, hyperbolic curves, infinite mysteries, historical myths, and national anthems.
Show Notes.
Star Force: Fugitive Alien II (Minoru Kanaya & Kiyosumi Kuzakawa, 1978 (tv show)/1987 (film)): MST3K Wiki. I…
#468 – Janna Levin: Black Holes, Wormholes, Aliens, Paradoxes & Extra Dimensions
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 …
What Does the Fourth Dimension Actually Look Like?
We know all about how things exist in the three dimensions of length, width, and height. Physicists often talk about time as a fourth dimension, but what if there were a fourth spatial dimension — another direction entirely? How on earth would we picture that?
Mathematicians use topology to visuali…
E216 - Janna Levin: An Astrophysicist's Guide to Black Holes, Higher Dimensions & the Nature of Reality
In this episode, I sit down with Janna Levin, a theoretical astrophysicist at Barnard College of Columbia University, Guggenheim fellow, and author of Black Hole Survival Guide, Black Hole Blues, A Madman Dreams of Turing Machines, and How the Universe Got Its Spots. Janna started out as a philosop…
In Theory with Janna Levin
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 th…
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If I have seen further than others, it is by listening to podcasts and standing upon the shoulders of
giants.
‐ Isaac "Llamacorn" Newton
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