From flying saucer sightings to an Air Force-funded study at CU Boulder, the city played an unexpected role in America's UFO ...

"This is a detective story that can be resolved with better data," Harvard astrophysicist Avi Loeb told Newsweek.

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

The marketing for Disclosure Day has been unusually cagey, and if you haven’t had the chance to catch Steven Spielberg’s new alien movie yet, we won’t spoil it here. As the name implies, though, ...