The Mars Express orbiter has kept an eye on an elongated cloud above Arsia Mons volcano for the last few years. The cloud is ...

Observations from the European Space Agency's Mars Express orbiter have been used to create this animation of a butterfly ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The various ridges and wind ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The Mars Express orbiter ...

Craters, craters, and yet more craters: this snapshot from ESA's Mars Express is packed full of them, each as fascinating as the last. This view of the Red Planet—taken by Mars Express's High ...