Rising more than twice the height of Mount Everest, Olympus Mons dominates the landscape of Mars and holds the title of the largest volcano in the Solar System. Its massive size and unique structure ...

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 ...

When NASA's Viking orbiters first photographed this same spot in 1976, the dark ash was barely visible.

New findings suggest that massive volcanoes played a pivotal role in shaping the early Martian landscape. We are about to explore the scientific evidence that supports this hypothesis and the ...

NASA scientists say the images provide far more than just a striking never-before-seen view of the Martian geography. Studying the features detailed in Odyssey's photos could help NASA prepare for ...

Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a ...

New images from the Mars Express spacecraft show ancient volcanic ash spreading across the Red Planet.

Add Yahoo as a preferred source to see more of our stories on Google. A NASA spacecraft that has been circling Mars for more than two decades has spotted something it never has before in well over 100 ...