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.

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 ...

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 US Government has released a new trove of documents on cases of "unidentified anomalous phenomena" (UAPs)—many of which would have been described in the past as unidentified flying objects or UFOs ...

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 ...