The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...

Steven Spielberg has yet to reveal much about his upcoming alien movie, but some conspiracy theorists think actual extraterrestrials could be featured.

AUSTIN — What if the big question surrounding the existence of aliens wasn’t whether they exist but why the U.S. government has been hiding this information from the American public for so long? And ...

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If life can exist—and persist—in seclusion, and in some of the harshest conditions on Earth (just look at ...

Steven Spielberg poses with the animatronic puppet from ET at Carlo Rambaldi’s studio in April 1982 - Mark Sennet/Getty Images Shortly after ET the Extra-Terrestrial was released in 1982, Ronald ...

People who believe they've been abducted by aliens have always resided at the farthest fringes of science, and the recent claim by a UFO cult known as the Raelians that they had cloned a human being ...

"Resident Alien" is a peculiar series, as it's unusually uplifting for a sci-fi show about an alien initially intent on killing all humans. One thing that remains a constant is the gorgeous scenery in ...