Something Weird Happens When E = –mc²

Ever wondered what flips when you let energy go negative? Derek Muller’s video takes you on a wild ride through Paul Dirac’s groundbreaking work: from the Schrödinger equation’s “oops” moments to the magic of the Dirac equation and the first prediction of the positron. Along the way, you’ll meet “the strangest man in physics,” unpack the Klein–Gordon hiccup, and revisit Heisenberg’s uncertainty principle through fresh archival footage and expert insights from Graham Farmelo and Cumrun Vafa.

By the end, you’ll see how antimatter behaves like matter running backwards in time—giving birth to the mind-bending idea of an “anti-world.” Packed with sleek animations, personal anecdotes, and all the geeky goodness you’d expect from Veritasium, it’s a succinct, fascinating dive into the anti-universe that math foresaw long before experiments could catch up.

Watch on YouTube