NASA claims to have found "bullet proof evidence" of Mars' watery past

A few weeks ago, NASA scientists announced they'd discovered something completely new on the surface of the Red Planet. Now they know what it is —and they're calling it the most powerful evidence for liquid water on Mars ever encountered by the Opportunity Rover. » 12/08/11 8:30am 12/08/11 8:30am

NASA: We've discovered something completely new on the surface of Mars

NASA may be ramping up for the launch of its next Mars rover mission later this month, but the Agency's Opportunity rover — which has been chugging around the Martian landscape for close to eight years, now — refuses to recede into obsolescence. You're looking at a close-up of the Martian surface, recently shot by… » 11/08/11 6:55am 11/08/11 6:55am