Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Modern astrobiology suggests that alien life would not evolve randomly, but under the same ruthless evolutionary pressures ...

Add Yahoo as a preferred source to see more of our stories on Google. While the buzzy sci-fi series is science fiction (obviously), Dr. Sward says there's plenty of real science peppered throughout.

Is alien life really out there? For decades, humanity has looked at the night sky and asked the same question. Now, according ...

The first episode opens with a familiar scenario. We witness a research ship in deep space carrying unknown alien organisms suddenly having an outbreak, with the aliens killing most of the crew. But ...

The TV series Alien:Earth has introduced a number of new creatures to the much loved, albeit terrifying, Alien franchise. But how realistic are the new aliens? That's a question that we—a trio of ...

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...

This fun fictional alien size comparison video lines up extraterrestrial creatures from across movies, TV, comics, and pop ...

The story of comet 67P/Churyumov-Gerasimenko and the European Space Agency's Philae spacecraft just got a whole hell of a lot more interesting. After a semi-botched landing resulting in the spacecraft ...