Paul Dirac | What if Antimatter Was Cheap

What if antimatter were cheap? That’s the mind-bending question explored in this episode of *Things I Learned Last Night*, where the hosts dive into the life and legacy of physicist Paul Dirac — a man so quiet he earned a unit of measurement named after him: one word per hour. Dirac’s groundbreaking work, particularly the Dirac equation, didn’t just unify Einstein’s relativity with quantum mechanics — it predicted the existence of antimatter, a mirror universe of particles with opposite charges. The episode traces how this theoretical concept became real: CERN recently succeeded in transporting antimatter particles for the first time, a breakthrough that could unlock revolutionary energy sources. One kilogram of antimatter, if harnessed, could power the entire Earth for a day — and with zero emissions. But the same power could also create weapons more devastating than nuclear bombs, annihilating matter on contact with no radioactive fallout. The episode also reveals a surprising real-world use: antimatter is already saving lives in PET scans, where positrons (antielectrons) help map tumors and brain activity. Yet, the most haunting idea remains: we may be living in a universe where antimatter worlds exist, mirror images of our own, invisible to us because light behaves the same for both. If we ever meet them, we’d vanish — not die, but cease to exist. The episode is a wild ride through science, philosophy, and dark humor, with the hosts oscillating between awe and absurdity.