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

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

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

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

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

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

A campaigner is calling on the government to resume investigations into alleged encounters.

Another batch of “UFO Files” have been dropped by the Pentagon, featuring previously classified documents, audio and footage of strange objects in the sky. The new release comes two weeks after the ...

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 ...

The latest batch of UFO files from the Pentagon includes artistic renderings by credible witnesses.