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

Add Yahoo as a preferred source to see more of our stories on Google. Mars, with its rust-hued surface, is known as the red planet for a reason. Along the way, Curiosity has made some extraordinary ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists may be one step closer in their hunt for signs of past life on Mars after the Curiosity rover's latest find. Nearly a ...