NASA's Mars Global Surveyor shows dark sand dunes in the north polar region of Mars. They are streaming away (toward the left) from a low escarpment at the edge of an outlier of polar water ice.

31 December 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark sand dunes in the north polar region of Mars. They are streaming away (toward the left) from a low escarpment at the edge of an outlier of polar water ice (the bright area on the right). The picture covers an area about 3 km (1.9 mi) wide and is located near 80.7°N, 80.2°W. Sunlight illuminates the scene from the lower left.

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