Decades of conspiracies have floated around the internet, putting the US government at the centre of a huge cover up regarding extra-terrestrials. However, even after documentaries, alleged probing victim statements, and numerous sightings, nothing was ever officially confirmed.

NPR's Scott Detrow talks with astrophysicist Adam Frank about the government's release of files related to Unidentified Anomalous Phenomena.

UFO belief is not a religion in the traditional sense. There are no centralized leaders: no popes, no universally recognized doctrines, no sacred text and no institution capable o

Perspective: As things stand, the files say implicitly what officials won't explicitly. For now, it's all aboard the intergalactic hype train.

Flying discs, metallic orbs, and a mysterious cylinder tumbling past the Apollo spacecraft. Those are just a few of the unidentified anomalous phenomena, or UAP, contained in a batch of government files the Department of Defense released this month.

Aliens or no aliens, life's most important questions are best answered securely

A newly declassified FBI memo discussing messages from 'aliens' was part of the Trump administration's latest UFO disclosure release on Friday.

A famous 'alien' photo, recently circulated as declassified material, has been traced back to a 1950 hoax, fuelling scepticism about the alien claims the Pentagon had been teasing for release.