Tall Boulder Rolls Down Martian Hill, Lands Upright
Pasadena CA (JPL) Aug 15, 2014 - A track about one-third of a mile (500 meters) long on Mars shows where an irregularly shaped boulder careened downhill to its current upright position, seen in a July 3, 2014, image from the High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter. The image is available online here http://www.jpl.nasa.gov/
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