How do neutrinos get their mass?

Neutrinos don't seem to get their mass in the same way as other particles in the Standard Model. In 1998, researchers made a discovery that challenged their understanding of particle physics and vaulted an unassuming particle into the spotlight for decades to come. The Standard Model, the theoretical framework that should explain ordinary matter and its interactions, predicted that particles called neutrinos had no mass. In experiments, neutrinos appeared to move at the speed of light, something...