From declassified footage to eyewitness testimonies, here are 10 must-watch UFO documentaries to prepare for Steven Spielberg’s Disclosure Day.

Many of the officials claim they cannot share more evidence for or details about the claimed alien encounters because they remain classified. The film's most explosive allegation, that an alien ...

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The decades-long mystery surrounding strange, unknown objects spotted throughout the skies has long remained under classification and shielded from the American public. However, the shroud of secrecy ...

Top 20 Best Alien Documentaries Welcome to WatchMojo, and today we’re counting down our picks for the most captivating documentaries and docuseries that cover the fascinating possibilities of visits ...

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.