A strange UFO sighting in Susa Valley, Italy, leads to the construction of Sacra di San Michele, and according to theorists, ...

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 new group of documents and videos related to UFOs, or UAPs, with 72 more documents, images and recordings.

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

A 1948 secret military report and reports of UFO activity at nuclear missile sites suggest a history of government ...

Alien and UFO sightings have been anomalies for decades. While the existence of extraterrestrials has become a laughingstock, with SNL making humorous alien sighting skits and Area 51 taking over meme ...

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

Compared to places with eerie reputations like Roswell and Area 51, the Bay Area isn’t exactly a hotbed of UFO activity. The ...

Steven Spielberg's 1977 classic tapped into anxieties about the US government hiding UFO information from the public. It holds the key to the director's new film, Disclosure Day.

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