The Mars Express orbiter launched to the Red Planet. Twenty years later, ESA has delivered a high resolution color image of ...

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 study debates the complex ethical questions that must be considered if we're to terraform Mars and lays the blueprint ...