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.

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

Trump administration science advisors are offering conventional explanations for some of the sightings of mysterious orbs of ...

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

The volume includes 40 new files, including 19 videos.

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

Sean Stone says the U.S. government reverse-engineered craft in the Roswell crash.

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