Like Earth and Venus, Mars has mountains, valleys, and volcanoes, but the red planet’s are by far the biggest and most dramatic. Olympus Mons, the solar system’s largest volcano, towers some ...

Mars has been born afresh in the human mind ... and wildly rapid swings from dusty and warm to cold and clear. (At the summit of Olympus Mons, for instance, the typical daily high is 40 degrees ...

From arachnid-like formations and mysterious blobs to an underground ocean and a giant volcano, here are our 10 favorite things scientists discovered on Mars this year.

Fresh from the excitement of this week’s Wolf Moon, there’s another treat in store for sky-watchers this week, with Mars ...

A satellite orbiting Mars ... Pavonis Mons and Ascraeus Mons, and together the three dead peaks form a near-perfect line ...