Neutrinos have been caught switching identities. The indisputable detection is a first, physicists announced July 19 at the European Physical Society meeting in Stockholm.
Neutrinos, wispy neutral particles that barely interact with anything, come in three types, or flavors: tau, muon and electron. In recent years, scientists have fired beams of muon neutrinos and found that many of them disappear before they reach detectors hundreds of kilometers away.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.