Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.

"Scientists are confident that life exists elsewhere in the universe. Yet rather than taking a realistic approach to what aliens might be like, we imagine that life on other planets is the stuff of ...

"Star Wars" has a seemingly never-ending supply of alien designs. However, these five are the worst of the bunch, falling ...

A lot of the alien races in the Star Trek universe are humanoid, and the original series explained that fact way back in the ...

A former CIA-linked physicist's comments about 'four alien species' have reignited UFO conspiracy theories online.