After Decades of Mystery, Scientists Debunk a Major Theory About a Bizarre Particle

A decade-long investigation into puzzling neutrino behavior has now ruled out one of the most widely discussed explanations: the sterile neutrino.

The Geminids are one of the best meteor showers of the year—and the weirdest. Here’s how to see them

This December's dazzling display comes from a strange asteroid with comet-like behavior—and a tail of debris that astronomers ...