On May 2, as sunlight crept over the Martian horizon, the Odyssey spacecraft captured Arsia Mons, a towering, long-extinct volcano, puncturing a glowing band of greenish haze in the planet’s upper ...

Arsia Mons, which dwarfs Earth's tallest volcanoes, and its two neighboring volcanoes are often surrounded by water ice ...

A new image from NASA’s Mars Odyssey orbiter reveals an extraordinary sight: a massive formation breaking through Mars’ early ...

A remarkable image captured by ESA’s Mars Express orbiter has brought renewed attention to a complex and heavily eroded ...