Dive into the fascinating theory that octopuses might not be from Earth—are they really aliens?

In one of the most baffling discoveries of the last decade, scientists have found a clue in a cave to how life might survive ...

Scientists may need to broaden their horizons in their search for alien life.

Sputnik skies to analysis of interstellar visitors, scientists are rethinking how and where to look for physical traces of ...

Robert Patrick is best known for playing the T-1000 in "Terminator 2: Judgment Day," but he was also in a sci-fi flick with a ...

A Brazilian neurosurgeon claims he performed surgery on a living alien, revealing shocking details from the 1996 Varginha UFO incident.

NO ALIENS, dead or alive, have ever been taken to Porton Down, a government website proclaimed last year in an attempt to ...

Bacteria that thrive on Earth may not make it in the alien lands of Mars. A potential deterrent is perchlorate, a toxic chlorine-containing chemical discovered in Martian soil during various space ...

Tiny delays in pulsar signals measured by SETI scientists could aid the search for gravitational waves and extraterrestrial life.

Long before Sputnik launched, something else may have already been orbiting Earth. Known as the Black Knight Satellite, this ...

Since its debut, "Star Trek" has introduced decades worth of new characters, locations, and alien races, but only a few disappeared from one day to the next.

Fringe, Terminator: The Sarah Connor Chronicles, and Falling Skies are all underrated science fiction TV shows that deserve ...