Alan Tudyk scored his first starring role with 'Resident Alien,' but he's long been celebrated in genre circles, and for good reason.

The largest-known piece of Mars ever found on Earth is going up for auction on Wednesday and could fetch as much as $4 million because of the rareness of an extraterrestrial item. Sotheby’s ...

The bold question-askers at What If look into the intelligence of octopuses and whether their alien nature points to origins in space.