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 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 Pentagon on Friday released another batch of UFO files following an initial drop that included never-before-seen documents related to incidents already public.The second drop includes over 40 ...

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 ...

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 ...

Neil deGrasse Tyson used a Monday appearance on 'The Fox News Rundown' in the US to throw down a blunt challenge after the ...