TL;DR: Veritasium dives into Paul Dirac’s brain-bending discovery that E=−mc² predicts negative energy states—leading him to the existence of the positron (anti-electron) and the idea that antiparticles move backward in time. Along the way you get a peek at Dirac’s famously odd personality, the failings of Schrödinger’s and Klein–Gordon equations, and why this “saddest chapter” in physics ended up birthing the anti-universe.
Packed with insights from Graham Farmelo and Cumrun Vafa, plus rare archives from Florida State and Caltech, the video uses slick animations and clear explanations to show how a quirky math equation reshaped our understanding of reality—complete with an exclusive tabletop game shout-out and all the geeky references you could want.
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