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Spider Web

Polygonal shapes like these are mostly found in the northern lowlands of Mars. The ridges are lighter colored because they are covered in bright frost. It is possible that patterned ground on Mars formed as the result of cyclic thermal contraction cracking the permanently frozen ground. This is an enhanced-color view generated from images acquired by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter (MRO). »