PBS Space Time PBS Space Time

Navigating with Quantum Entanglement

Oct 30, 2026 · 21m

Summary

This episode explores the quantum mechanical basis of avian magnetoreception, proposing that birds navigate using entangled radical pairs in cryptochrome proteins within their eyes. The discussion covers the history of pigeon navigation, the physics of Earth's magnetic field, and recent evidence supporting this "quantum biology" hypothesis. The segment concludes with a brief Q&A on the ultimate fate of neutron stars and a humorous take on Russell's teapot.

Topics discussed

Sponsors: LinkedIn and Google Chrome Schrödinger's vision: Quantum mechanics in life WWII spy pigeon All Alone and navigation Bird magnetoreception history and theories Earth's magnetic field properties and strength Sponsors: LinkedIn and Google Chrome Sponsors: Google Chrome and Gatorade Zero Electron spin and the radical pair hypothesis Quantum entanglement and singlet/triplet states Cryptochrome protein and magnetic vision mechanism Evidence for cryptochromes in navigation Sponsors: LinkedIn and Google Chrome Sponsors: Google Chrome and Gatorade Zero Quantum biology validity and other examples Conclusion on avian compass and quantum biology Patreon shoutout and relativity teaser Promo: PBS show Weathered Q&A: Supernova types and neutron star fates Sponsors and Russell's Teapot analogy Sponsors: Bose and Sam's Club
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