On April 11, 1960, astronomers began the first scientific experiment that would search for extraterrestrial life. Known as ...

A strange purple object aboard the ISS sparked alien fears online, but NASA revealed it was a potato experiment. It shows how microgravity can turn ordinary plants into bizarre shapes.

Add Yahoo as a preferred source to see more of our stories on Google. Who's your favorite mischievous extraterrestrial, who just happens to have his own special day? Need another hint? He's (it's) ...