Riding with Robots writes "Mars researchers report that a robotic spacecraft orbiting the Red Planet has revealed hundreds of small fractures exposed on the Martian surface that once directed flows of water through underground Martian sandstone. 'This study provides a picture of not just surface water erosion, but true groundwater effects widely distributed over the planet,' said one of the mission scientists for the Mars Reconnaissance Orbiter, which has been regularly returning terabytes of high-resolution images and other kinds of data from Mars."
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