A Cuban airplane hijacker convicted of aircraft piracy faces release in Florida after a judge cited the Zadvydas ruling on ...

K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually ...

Pilot Kenneth Arnold took flight from Chehalis, Washington in his single-engine airplane, looking for a missing military ...

Why do we tend to assume that UFOs are crafts carrying alien beings rather than alien beings themselves? How the UFO ...

Stacker compiled a ranking of cities with the most UFO sightings in Wyoming using data from the National UFO Reporting Center.

Stacker compiled a ranking of cities with the most UFO sightings in Kentucky using data from the National UFO Reporting Center.

Plane watchers are keeping an eye on the sky Thursday after an aircraft registered as SAUCER1 took flight from Area51 just ...

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to lead a team of outside scientists to study the national security risks ...