But the real truth is that alien life on other planets could be even stranger than floating balloons or amorphous organisms ...

Is intelligent alien life really out there? With powerful telescopes identifying more potentially habitable planets each year ...

Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

Is water enough to find alien life? New research reveals phosphorus and nitrogen are crucial. Discover the 'chemical ...

Life on Earth may exist thanks to an incredible stroke of luck — a chemical sweet spot that most planets miss during their formation but ours managed to hit.

Well, at least that means no alien invasions anytime soon.