Your Bones Generate Electricity Every Time You Walk
Most people think your skeleton is the dead part. The framework. The hanger your soft body is draped on. They could not be more wrong. Every step you take, your shinbone produces a tiny electrical voltage — and microscopic cells buried inside that bone are listening for the signal. They have been listening every second of your life. And when they stop hearing it, your skeleton starts vanishing. In this video, Feynman walks us through the strangest mechanical-electrical trick in your body — the piezoelectric property of bone collagen, first discovered by Fukada and Yasuda in Japan in 1957 — and explains how it solves a 65-year-old mystery posed by Wolff's Law: how does a buried cell know whether you've been walking, running, or lying still? 📚 SOURCES & FURTHER READING: Fukada, E. & Yasuda, I. — "On the Piezoelectric Effect of Bone" (Journal of the Physical Society of Japan, 1957) Curie, J. & Curie, P. — "Développement par compression de l'électricité polaire dans les cristaux hémièdres à faces inclinées" (1880) Wolff, J. — Das Gesetz der Transformation der Knochen (The Law of Bone Remodeling, 1892) Bassett, C.A.L. — "Generation of Electric Potentials by Bone in Response to Mechanical Stress" (Science, 1962) Skylab biomedical results — NASA Technical Report (1977) 00:00 — Take a step. Now what really happened? 01:42 — Why bone is not stone (the composite trick) 04:18 — The 1880 lab where two French brothers squeezed a crystal 07:05 — Japan, 1957: catching the bone in the act 10:24 — The 65-year-old question Wolff could not answer 13:11 — The buried city inside your shinbone 16:30 — Why astronauts come back with less skeleton 19:12 — Faking a footstep to heal a broken leg 22:40 — The same geometry in quartz and in you 25:18 — What else is hiding in plain sight? Voice & visuals: AI-generated. Scripted as an original lecture inspired by Richard Feynman's teaching style. Channel: Feynman Reborn What is the strangest thing you have ever learned about your own body? ⚠️ WARNING: [This video is AI-generated (synthetic voice and visuals). It is an original, fictional lecture inspired by Richard Feynman's teaching style and public ideas, and is not an authentic recording, endorsement, or statement by Richard Feynman or his estate. Any resemblance is for educational/creative purposes]
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