A NASA spacecraft that has been circling Mars for more than two decades has spotted something it never has before in well over 100,000 orbits of the Red Planet. On a morning horizon in May, the ...

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

Scientists have discovered a mysterious hole on the surface of Mars, and they have no idea what lies inside it. This pit, located in the Arsia Mons region — one of Mars’ giant volcanoes — could ...

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 ...

Photographs taken by a spacecraft orbiting Mars indicate active volcanoes might exist on the red planet, further eroding its image as a dead world and offering prime sites to prospect for signs of ...

Simulations suggest ancient Martian volcanoes sent steam to the equator, where it froze into buried ice that may still exist and guide future exploration. The authors suggest that these eruptions ...