Nobel Prize in Physics Honors Flavor-Changing Neutrino Discoveries

Takaaki Kajita and Arthur B. McDonald will share this year's Nobel Prize in physics for helping to reveal that subatomic particles called neutrinos can change from one type to another — a finding that meant these exotic particles have a teensy bit of mass. Neutrinos are the second-most abundant particles in the cosmos, constantly bombarding Earth. In their separate experiments, Kajita and McDonald each showed that neutrinos change between certain flavors — a process called neutr