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

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

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 ...

Emergency Assistance: Nations signing the Artemis Accords are committed to assisting astronauts and personnel in outer space who are in distress.

Discover what we know about space, where it starts, how we measure it, and what floats around in it, from supermassive black holes to giant stars, freezing nebulae and fascinating other worlds.