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 ...

NASA’s MAVEN spacecraft has observed atmospheric sputtering on Mars for the first time, confirming how solar wind stripped the Red Planet’s thick atmosphere and transformed its climate.

The Deuteronilus Cavus crater has been shaped by water, wind, ice and volcanic erosion over billions of years, showcasing ...

Mars, the other world, followed a different path. Today the Martian surface is hostile to life as we know it, but as this scientific story goes, Mars may have once hosted a rich abundance of microbes.