Donald Trump's declassified UFO files and the documentary Sleeping Dog reignite the debate on extraterrestrial life, yet officials maintain no evidence confirms alien existence.

A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.

The Pentagon on Friday released a third batch of vintage classified files related to “flying saucers” and other unidentified anomalous phenomena — better known to most Americans as unidentified flying ...

The Trump administration on Friday released much-anticipated UFO files with images showing evidence of what could be extraterrestrial life. THIS BLOG IS NOW CLOSED Article continues below ...

Add Yahoo as a preferred source to see more of our stories on Google. A renewed push in Washington is bringing one of the world’s most controversial UFO cases back into the spotlight—this time with ...

Newly-released material from the so-called UFO files includes reports of unexplained green orbs, discs and fireballs zooming across the sky, with investigators yet to find an explanation for the sight ...

The United States on Friday released another batch of classified files related to UFO sightings, including reports of glowing, red orbs seen in northeastern America ...

New batch of previously classified government documents takes no position on origin of unidentified aerial phenomena (UAPs) ...

The Donald Trump administration has released numerous files about reported UFO sightings as well as bizarre claims and reports about the surface of the Moon ...