Former "Aquaman" actor Jason Momoa will soon return to the DC Universe as Lobo, but decades ago, he played another alien badass on a Syfy TV series.

New research suggests Mars may have remained habitable much longer than scientists once thought. Ancient sand dunes in Gale Crater appear to have been soaked by underground water billions of years ago ...

There is a category of planet that belongs to no star. It was thrown clear of its solar system early in the chaos of ...

Moons orbiting free-floating planets that wander the cosmos without a host star could sustain extraterrestrial life for billions of years ...

A new study by the SETI Institute suggests that the alien signals might be right here, surrounding us all of the time, and we're just unable to pick them out.

In a series of experiments at Johns Hopkins University, Lily Zhao fired tiny samples of a microorganism with a room-sized gas ...

As Nicolas Roeg’s enigmatic, unclassifiable film – in which David Bowie plays an alien visiting Earth – turns 50, we look back at Tom Milne’s deciphering of it. From our Summer 1976 issue.

Unlike our Moon, they can keep water in oceans liquid for more than 4 billion years.

You kind of knew that Steven Spielberg believes in aliens. But did you know know? In your heart of hearts? The man behind E.T., Close Encounters of the Third Kind, and War of the Worlds is leaving no ...

The Sun, along with more than 1,500 other stars, journeyed from the middle of the Milky Way to its current position a few billion years ago.

New lab experiments explore whether or not certain rudimentary lifeforms could exist in the hydrocarbon lakes and seas of Saturn's moon Titan ...

"Extremophile" bacteria could survive asteroid impacts that are strong enough to launch them into space, suggesting that life could travel between planetary bodies.