Fresh evidence of volcanic activity on Mars is reshaping how scientists think about the planet’s potential to host life, past or present. Instead of a cold, geologically dead world, Mars increasingly ...

Astronauts train to scale a Mars volcano at an analogue site in France. Lava tubes that crisscross the Martian surface might provide sanctuaries for the first human explorers on the Red Planet. (Photo ...

Olympus Mons, a shield volcano on Mars, is the largest volcano in the solar system, measuring approximately 370 miles in diameter and 26 kilometers in height. The formation of Olympus Mons and three ...

Olympus Mons on Mars is the tallest mountain in the solar system, towering nearly three times higher than Mount Everest.

Phobos, the oddly-shaped moon of Mars, has been captured in a series of stunning images gliding above the planet’s volcanic ...

On some Mars images, Olympus Mons does not look dramatic at first glance. It sits there quietly, a wide pale rise against rust coloured plains. No sharp peak. No obvious violence. Only when scale is ...