TL;DR

Dive into how Paul Dirac wrestled with the concept of negative energy, found Schrödinger’s equation wanting, and crafted the Dirac equation—which astonishingly predicted the existence of antiparticles (hello, positron!). Along the way you get a peek at the strange life of the “strangest man in physics,” learn why antiparticles can be thought of as time-travelers, and discover how this led to the idea of an entire anti-universe.

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