The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common alien theories, explained. This voice experience is generated by AI. Learn more.

After seeing Steven Spielberg's "Disclosure Day," check out these real-life accounts of strange aerial sightings.

Americans "deserve the truth," a U.S. congressman has told a press conference as part of a wider transparency campaign.

Science fiction stories about “alien” invaders are often political allegories for anxieties around immigration. Now, a government website depicts non-citizens as extraterrestrials.

Dr. Hal Puthoff claims the U.S. has recovered remains of four separate species of alien life from UFOs, citing people involved in the recoveries.

A former CIA-funded researcher claimed that "at least four" different alien species have been discovered in wreckage collected by the U.S. government, though no physical evidence has been submitted to

Fresh allegations that US intelligence agencies may be secretly holding recovered alien technology have revived one of Washington's most persistent debates, after a prominent UFO whistleblower claimed that billions of dollars are being directed into concealed programmes shielded from congressional oversight.

Many have watched recently released UFO videos, but most still think the government knows more than it is saying.

President Trump broke his silence on the recently released files on unidentified flying objects (UFOs) and unidentified aerial phenomena (UAP)

When ET phones, don’t pick up. Scientists have outlined a set of protocols for responding to extraterrestrial contact, including a bizarre directive to refrain from answering cosmic correspondence. Adopted by the International Academy of Astronautics (IAA),

What Roy Mauritsen remembers about seeing Steven Spielberg’s "Close Encounters of the Third Kind" as a boy is the looming shape of Devils Tower. For a kid growing up in Suffolk County, the peculiarly flat-topped rock formation in Wyoming — which serves as the site of a mind-boggling meeting between mankind and alien-kind — was a mysterious and mesmerizing image.