NASA administrator Jared Isaacman says declassified UAP files show real unexplained phenomena but no alien bodies or crashed ships have been found.

The Pentagon has released hundreds of UFO-related files, including Apollo mission transcripts, military videos and eyewitness reports of unexplained aerial phenomena. While the disclosures have raised questions over extraterrestrial life,

The government gave no analysis of the files, suggesting it is up to Americans to draw their own conclusions.

Steven Spielberg's "Disclosure Day" returns Hollywood's preeminent big-screen craftsman to one of his most abiding questions: Are we alone.

More than 300 pages of intelligence reports from the National Security Agency have shed new light on UFO sightings.

If and when SETI discovers alien life, a revised Declaration of Principles guarantees once the discovery has been verified, its disclosure will come soon after.

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

Buzz Aldrin is quoted as having made three observations, one of which was of something with a "sizeable dimension."