Something Weird Happens When E=−mc²

This Veritasium deep dive unpacks how Paul Dirac wrestled with the idea of negative energy and ended up predicting an entire anti-universe. From the quirks of the Schrödinger and Klein–Gordon equations to the birth of the Dirac equation, we follow the rabbit hole that led to the first theoretical glimpse of the positron—and the mind-bending notion that antiparticles might zip backwards in time.

Along the way, you’ll meet “the strangest man in physics,” get a front-row seat to Heisenberg’s uncertainty principle, and learn why the discovery of anti-electrons ranks among the saddest—and most sublime—chapters in modern physics. Sponsored by Hostinger, this video is packed with expert insights, archival goodies from FSU and Caltech, and a rollicking ride through the anti-world.

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