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 ...

Learn more about volcanic activity on Mars and how it may have once provided vital elements to the atmosphere.

Mars has a new showpiece for planetary scientists, and it looks uncannily like a butterfly frozen mid-flight. A fresh set of ...

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 ...

A NASA orbiter has captured a stunning image of a giant volcano on Mars. The panorama, captured on May 2 by NASA’s Mars Odyssey orbiter, shows Arsia Mons, one of the largest volcanos on the Red Planet ...

A dazzling image taken by NASA’s 2001 Mars Odyssey orbiter shows an unprecedented view of a 12-mile-high volcano poking through clouds at dawn on the Red Planet. Arsia Mons, which dwarfs Earth’s ...

Mars’s marred surface consists of craters, canyons, and mysterious formations that hint at a complex geological past. Scientists recently studied a tantalizing feature that could shed light on the ...

Mars Express has found a unique butterfly-shaped crater on Mars. This formation resulted from a space rock hitting at a low ...

A chance discovery by a NASA rover on Mars shows that the red planet has a form of lightning, which researchers had suspected ...

A new look at an ancient volcanic blast on Mars suggests that the Red Planet was much more Earth-like billions of years ago, with abundant surface water and a relatively thick atmosphere, scientists ...