(CNN) -- If the Curiosity rover had been sent to Mars in ancient times, it might have found itself sinking in a stream.
The 2,000-pound super-rover, which made its now-legendary landing on Mars on August 6, has come across stones in conglomerate rock suggesting that water must have flowed there in the past.
MORE: http://www.cnn.com/2012/09/27/us/mars-rover-water/index.html?hpt=hp_inthenews
See also...
Mars Rover Opportunity Working at 'Matijevic Hill'
http://www.sciencedaily.com/releases/2012/09/120930160414.htm