text: Rover discovers clues of water on Mars surface After months of crossing a vast Martian crater floor and zigzagging up low-slung hills, NASA #39;s Spirit rover has spotted its first hint that water once coursed across the now-desert-like region, scientists said Wednesday. 
inputs: Rover discovers clues of water on Mars surface After months of crossing a vast Martian crater floor and zigzagging up low-slung hills, NASA #39;s Spirit rover has spotted its first hint that water once coursed across the now-desert-like region, scientists said Wednesday. 