Nasa's Curiosity rover finds water in Martian soil

Dirt sample reveals two pints of liquid water per cubic feet, not freely accessible but bound to other minerals in the soil

Water has been discovered in the fine-grained soil on the surface of Mars, which could be a useful resource for future human missions to the red planet, according to measurements made by Nasa's Curiosity rover.

Each cubic foot of Martian soil contains around two pints of liquid water, though the molecules are not freely accessible, but rather bound to other minerals in the soil.

http://www.theguardian.com/science/2013/sep/26/nasa-curiosity-rover-mars-soil-water