Hundreds of flights were canceled in the U.S. Northeast on Monday due to technical problems at a key regional air traffic control center.

“Cosmic-ray air showers are sprays of particles raining down from high in the sky,” explains Jesse Liu of New York University, the lead author of a paper that describes the study. He adds that cosmic ...

Shemar Moore opens up about S.W.A.T. Exiles, Hondo’s darker journey, his remarkable television career, fatherhood and the fans who keep him going.

U.S. President Donald Trump and Chinese leader Xi Jinping are expected to meet this week to discuss artificial intelligence.