This is a video about some of the many times we have nearly blown up the world. Part of this video is brought to you by Henson -- head over to https://hensonshaving.com/veritasium and enter code 'Veritasium' for 100 free blades with the purchase of a razor. Make sure to add both the razor and the blades to your cart for the code to take effect. ▀▀▀ References: List of Broken Arrows -- https://ve42.co/AtomicArchive https://ve42.co/BrokenArrowsReport Declassified Goldsboro Report -- https://ve42.co/Goldsboro Operation ChromeDome -- https://ve42.co/OperationChromeDome CIA website -- https://ve42.co/CIA Cataclysmic cargo: The hunt for four missing nuclear bombs after a B-52 crash -- https://ve42.co/WoPo THE LAST FLIGHT OF HOBO 28 -- https://ve42.co/lastflight The Voice of Larry Messinger is from this documentary -- https://ve42.co/Messinger Even Without Detonation, 4 Hydrogen Bombs From ’66 Scar Spanish Village -- https://ve42.co/NYTPalomares Decades Later, Sickness Among Airmen After a Hydrogen Bomb Accident -- https://ve42.co/NYTPalomares2 Picture of ReVelle -- https://ve42.co/JackReVelle1 Great NPR where the audio of ReVelle is from -- https://ve42.co/JackReVelle2 CIA Website -- https://ve42.co/CIA ▀▀▀ Special thanks to our Patreon supporters: Anton Ragin, Balkrishna Heroor, Bernard McGee, Bill Linder, Burt Humburg, Dave Kircher, Diffbot, Evgeny Skvortsov, Gnare, Jesse Brandsoy, John H. Austin, Jr., john kiehl, Josh Hibschman, Juan Benet, KeyWestr, Lee Redden, Marinus Kuivenhoven, Mario Bottion, MaxPal, Meekay, meg noah, Michael Krugman, Orlando Bassotto, Paul Peijzel, Richard Sundvall, Sam Lutfi, Stephen Wilcox, Tj Steyn, TTST, Ubiquity Ventures ▀▀▀ Directed by Petr Lebedev Written by Petr Lebedev and Derek Muller Edited by Peter Nelson Animated by Fabio Albertelli, Jakub Misiek, Ivy Tello and Mike Radjabov Filmed by Derek Muller Produced by Petr Lebedev and Derek Muller Additional video/photos supplied by Getty Images and Pond5 Music from Epidemic Sound ... https://www.youtube.com/watch?v=ILgSesWMUEI

At the Palais de la Decouverte in Paris, they showed me this experiment where a 1kg aluminium plate is levitated above a large coil of wire that is being supplied with 800A of alternating current at 900Hz. This is by far the best demonstration of electromagnetic induction I have ever seen. Back in London, I visited the magnetic lab of Michael Faraday in the basement of the Royal Institution. It was here that he did his groundbreaking work on induction. People had previously observed that current in a wire causes a compass needle to deflect, but more exciting was the prospect of using a magnetic field to generate current. Faraday created his famous induction ring by winding two coils of insulated wire onto an iron ring. When he connected a battery to one coil, a small pulse of current was induced in the other. When the battery was disconnected, current was induced in the other direction. This led Faraday to the conclusion that current was induced in the second coil only when the magnetic field through it was changing. And if they hadn't been wrapped on the same ring, Faraday may have noticed that the two coils repel each other when the current is induced due to the interaction of their magnetic fields. This is the same thing that is happening with the aluminium plate, except we're using alternating current to create a continually changing magnetic field. This induces an alternating current in the plate, producing an opposing magnetic field which levitates the disk.