Mars rover finds evidence of ?vigorous? stream
NASA's Curiosity rover, on Mars since August 6, has discovered gravel once carried by the waters of an ancient stream that "ran vigorously" through the area, the U.S. space agency said.
Source: http://www.cosmosmagazine.com/news/6021/mars-rover-finds-evidence-%E2%80%9Cvigorous%E2%80%9D-stream
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