As the peerless "Aliens" turns 40, here are 26 reasons it's still the greatest sci-fi action movie of all time.

WASHINGTON, D.C. — NASA shares an update on its multibillion-dollar effort to build a permanent moon base on the lunar south pole. On Tuesday, the U.S. space agency announced nearly $600 million in ...

The tantalizing prospect of inspecting a mysterious monolith on the surface of Mars moon Phobos was proposed earlier this ...

If someone showed you photos of Mono Lake without context, you’d probably guess they were filming the next big space epic ...

America's most daring, extraordinary feat, landing astronauts on the moon, remains the pinnacle of achievement by anyone ...