After seeing Steven Spielberg's "Disclosure Day," check out these real-life accounts of strange aerial sightings.

No bombshells so far in the latest Pentagon batch of declassified Unidentified Anomalous Phenomena files. But they show the CIA hid its involvement.

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 more.

Americans "deserve the truth," a U.S. congressman has told a press conference as part of a wider transparency campaign.

The Pentagon has released a trove of new images and videos featuring mysterious orbs, dots and unidentified flying objects as part of its rollout of files related to UFOs and potential extraterrestrial activity.

New UFO files have been released by the Trump administration that include several vivid descriptions of mysterious sightings in the sky

A campaigner is calling on the government to resume investigations into alleged encounters.