Mars was once 'soaked' with water
Liquid water once drenched the surface of Mars - offering conditions which may have supported life, NASA scientists announced on Tuesday. Accumulated evidence from NASA's Mars rover Opportunity which landed on the Martian plateau, Meridiani Planum, on 25 January strongly suggests the site was once "soaked," said Steve Squyres, the mission's chief scientist, at NASA headquarters in Washington DC.
Postscript: See also More signs of water found on Mars (BBC: 06-Mar-04))