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

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.

Astronomers have been scanning the skies for alien radio signals for decades, but so far they’ve heard nary a peep (with one possible exception). But according to a recent study, that could be because ...

A look at alien-like landscapes captured by NASA’s Juno spacecraft.