A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.

Internet-famous UFO stories so wild they may just be true Alien and UFO sightings have been anomalies for decades. While the ...

UFOs have long been a central theme in popular culture. TV shows and films from "Mork and Mindy" to the "X-Files," from "E.T." to "Men In Black," and music bands from the Carpenters to Radiohead, have ...

The mystery of Peru's "conehead" mummies has baffled scientists for decades, and new DNA tests on the mummies' teeth have ...

The Pentagon has released another batch of ‘UFO Files’ with footage of unknown objects in the sky—here are the most common ...

"I don't know if they're real or not," US President Trump said of aliens. But he said interest in the topic led him to order the ...

In 1995, a grainy black and white film claiming to show the autopsy of an alien was broadcast to more than a billion people ...

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The White House‘s new Aliens.gov site is not a long-awaited step toward UAP disclosure. It is an immigration enforcement ...