This video explores the uncomfortable possibility that the biggest obstacle in finding alien life is not distance, but ...

Grain-sized remnants of alien technology may get caught in solar wind and land on plants and moons close to us ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new ...

The Pentagon's latest release of declassified Unidentified Anomalous Phenomena files places a spotlight on reports and recordings from the Northeastern United States, including two videos documenting ...

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

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

Science fiction stories about “alien” invaders are often political allegories for anxieties around immigration. Now, a government website depicts non-citizens as extraterrestrials.

A rendering of a potential Dyson sphere, named after Freeman A. Dyson. As proposed by the physicist and astromomer decades ago, they would collect solar energy on a solar system wide scale for highly ...

A congressman on the House Oversight Committee's Task Force on the Declassification of Federal Secrets teased a "holy c--p" alien moment in a forthcoming release of UFO files, the first batch of which ...

In broad daylight on April 14, a human climbed the most prominent feature of the Las Vegas skyline: the 366-foot-tall, $2.3 billion Sphere. A helicopter hovering over the state-of-the-art ...