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

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.

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

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth.

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 ...

From the Navy’s infamous Tic-Tac encounter to thousands of recent reports, believers say some of the strangest UFOs may be ...

Internet-famous UFO stories so wild they may just be true Alien and UFO sightings have been anomalies for decades. While the ...

A series of UFO sightings by federal officials in the western US are detailed in striking illustrations made public by the War Department Friday. The artist renderings of the encounters “near a ...

Buzz Aldrin is quoted as having made three observations, one of which was of something with a "sizeable dimension." ...

Kansas City has long been a hotbed of activity, says Margie Kay, director of the Missouri chapter of the Mutual UFO Network ...