Newly released UFO files reveal 1948 theories about non-human life, silver discs and bizarre Cold War encounters.

The files that were released on Friday contained information about alleged UFO sightings, including unexplained green orbs, ...

New Pentagon files highlight decades of unexplained aerial phenomena in New Mexico ...

The second wave of UFO files has revealed a chilling series of mysterious sightings near America's main nuclear weapons ...

Among other documents that have been declassified by Donald Trump’s administration are a series of sightings in a secret ...