study http://www.space.com/22949-mars-water-d … rover.html Martian soil huge amount of water http://www.space.com/22949-mars-water-d … rover.html Oh, by the way, Curiosity discovered evidence of water. SPACE.com. apa potabila exciting discovery Mars once had water Mars once had water water in the surface soil on Mars Space.com Space Space thirty-five liters of water