Are Neutrinos Their Own Evil Twins? Part 1: So We're Going to Redefine "Particle"

A brilliant physicist vanished in 1938, leaving behind one strange, quiet paper. It described something that shouldn't exist: a particle that is its own antiparticle. To understand why that matters, we first need to rethink what a particle even is — and that means getting weird with chirality, the Higgs field, and the neutrino's stubborn refusal to follow the rules.