Something broke physics in 2023. A single subatomic particle — a neutrino — came screaming into Earth carrying energy so obscene, so far beyond anything the universe should be capable of producing, that scientists had no framework to explain it. For context, it packed 100,000 times the punch of the highest-energy particle ever coaxed out of the Large Hadron Collider, the most violent particle-smashing machine humanity has ever built. The universe, as far as we knew it, had no engine powerful enough to fire such a thing.
