These shocking UFOs have been spotted over some of the biggest cities in the U.S. See more in this compilation from The Proof is Out There.

If you're a skeptic, these UFO sightings will convince you that the truth is out there—and it may not be from Earth. Eerie UFO sightings we can’t 100% explain Everyone has an opinion when it comes to ...

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

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

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

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

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

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

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