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 ...

Why do we tend to assume that UFOs are crafts carrying alien beings rather than alien beings themselves? How the UFO ...

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

National attention on UFOs has shifted in recent years, especially after the US government in the past decade has released ...

The volume includes 40 new files, including 19 videos.

Stacker compiled a ranking of cities with the most UFO sightings in Georgia using data from the National UFO Reporting Center.

Pilot Kenneth Arnold took flight from Chehalis, Washington in his single-engine airplane, looking for a missing military ...

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

NASA's relationship with UFOs has evolved alongside broader changes in public and government interest in unexplained ...