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.

Nearly all the reports from the federal agents also included a detail about a vehicle-like object moving down the highway ...

A new batch of over 200 files has today been released by the Pentagon – containing remarkable video of what appear to be spherical aircraft of unknown origin ...

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 ...

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 ...

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 ...

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

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 ...

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 ...