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How One Line in the Oldest Math Text Hinted at Hidden Universes


Discover strange new universes that turn up at the core of Einstein’s General Relativity. Head to to start your free 30day trial, and the first 200 people get 20% off an annual premium subscription.

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If you’re looking for a molecular modeling kit, try Snatoms – a kit I invented where the atoms snap together magnetically –

A massive thank you to Prof. Alex Kontorovich for all his help with this video.

A huge thank you to Prof. Geraint Lewis and Dr. Ashmeet Singh for helping us understand the applications of NonEuclidean geometry in astronomy/cosmology.

Lastly, a big thank you to Dr. Henry Segerman and Dr. Rémi Coulon for helping us visualize what it’s like to be inside hyperbolic space and helping us understand hyperbolic geometry.

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Crocheting Hyperbolic Planes: Daina Taimina by Ted, via YouTube

Hyperbolic Crochet model

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Directed by Casper Mebius
Written by Casper Mebius, Petr Lebedev, Emily Zhang, Derek Muller, and Alex Kontorovich
Edited by Jack Saxon
Animated by Fabio Albertelli, Ivy Tello, and Mike Radjabov
Illustrations by Jakub Misiek and Celia Bode
Filmed by Derek Muller
Produced by Casper Mebius, Derek Muller, and Han Evans

Additional video/photos supplied by Getty Images, Pond5, and by courtesy of: NASA, NASA's Goddard Space Flight Center, NASA Goddard Flight Lab/ CI Lab, NASA’s WMAP science teams, ESO, and ESA/Hubble.
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