Check out 5 MORE mysterious UFO sightings that just can’t be explained, in this The Proof Is Out There compilation.

A U.S. pastor claims he was taken to a secret UFO disclosure gathering in Tennessee ...

Maj. Gen. William Neil McCasland vanished from a hiking trail in Albuquerque on February 27, which experts say could be a ...

The Pentagon on Friday released a new group of documents and videos related to UFOs, or UAPs, with 72 more documents, images and recordings.

He estimates hundreds of incidents occur annually that baffle military leaders.

Alarmed defense experts believe these UFOs may be highly advanced, next-generation spy drones, raising concerns about ...

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

A third batch of declassified UFO files were released by the Pentagon Friday. The latest such release in the Trump administration's new wave of public disclosure of Unidentified Anomalous Phenomena ...

The Pentagon on Friday released a third batch of vintage classified files related to “flying saucers” and other unidentified anomalous phenomena — better known to most Americans as unidentified flying ...

No bombshells so far in the latest Pentagon batch of declassified Unidentified Anomalous Phenomena files. But they show the ...

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