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

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.

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 ...

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 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 ...

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 ...

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 ...

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 blockbuster release of Pentagon UFO files under President Donald Trump's push for transparency has triggered widespread panic that ETs are already among us and possess technology far superior to ...

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

Read the full story in this post or scroll down to catch up as it all happened: We're ending our live updates now after a second batch of previously classified files on alleged UFO sightings were ...