text: More clues hint Mars watery past BEIJING, Aug. 19 (Xinhuanet) -- NASA #39;s Mars rovers have uncovered more clues about how water shaped the Red Planet, scientists said Wednesday. 
inputs: More clues hint Mars watery past BEIJING, Aug. 19 (Xinhuanet) -- NASA #39;s Mars rovers have uncovered more clues about how water shaped the Red Planet, scientists said Wednesday. 