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 ...

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 ...

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 ...

A spacecraft's-eye view over the landscapes of Mars has just given us a first-of-its-kind glimpse of the giant, ancient edifice known as Arsia Mons. The NASA satellite Odyssey captured the enormous ...

While Mars may appear round, its true shape is subtly stretched and uneven, a product of its unique geological past and ...

Young Mars would have been a staggering place to explore. The Red Planet was covered in flowing rivers of both water and lava. At the time, a series of four volcanoes — Olympus Mons and the three ...