Jay Stratton's memoir, 'Out of the Shadows,' is being published Oct. 13

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn more.

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

Rep. Tim Burchett told Piers Morgan aliens exist, pointing to government briefings, pilot testimony and video evidence shown to him by officials as proof.

Suppose there are signs of extraterrestrial life and we have not yet been able to detect them. What does that mean? In Nature Astronomy, researchers discuss the consequences of these so-called false-negative results.

For decades, UFOs and the possibility of alien life have been a major part of pop culture, inspiring everything from blockbuster movies to conspiracy theories and viral internet debates. As fascination with extraterrestrials has grown, some celebrities ...

The Trump administration announced the release of newly declassified Unidentified Anomalous Phenomena records, launching a Department of War website to provide public access to government files as part of a transparency push.

How Radio Astronomy Helps Us See the Invisible Cosmos," astrophysicist Emma Chapman describes the hidden corners of space that only radio waves can reveal — and makes the case for contacting aliens.

NEW YORK (AP) — A moment early on in “Disclosure Day” will instinctively feel familiar to anyone who grew up with Steven Spielberg films. A TV weather report predicts hail. The camera pans downward, from television set to kitchen table. Plinking sounds begin. Cereal falls into a bowl.