New images from the Mars Express spacecraft show ancient volcanic ash spreading across the Red Planet.

Asteroids are no longer just celestial curiosities on a telescope chart; they are emerging as test beds for a new resource economy that could reshape how humanity powers industry, builds ...

Add Yahoo as a preferred source to see more of our stories on Google. Local meteorite expert Mike Hannkey showcases dozens of ancient space rocks. SpaceX has the momentum to become Musk's favored ...

A huge geological structure on Mars resembling a bathtub ring may be evidence of an ocean that once covered a third of the ...