Water on Mars

A study shows Mars's rivers persisted up until one billion years ago—and possibly for even longer than that.

These images are as close as any of us are getting to Mars any time soon—but they're beautiful enough to be a worthy consolation prize.

Is the briny sludge teeming with tiny organisms?

These curious cracks suggest that the lake levels changed often over time.

And the ice formations would be ideal locations for finding life, if it exists.

The agency is set to announce details on Thursday at 2 p.m. ET.

It's just a rock, but it's still cool.

Because Mars isn't geologically active, it could provide a window to the formation of life.

Experts say the recent discovery that liquid water may run on the Martian surface changes the conversation about the Red Planet's habitability.

Hydrated salt flows suggest liquid water was present on the Martian surface within a few days of the data gathering.

A new research paper confirms liquid water on the surface of the Red Planet