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Polygons, Crater Layers, and Defrosting Dunes

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Summary

This image from NASA Mars Reconnaissance Rover shows the north polar region of Mars is surrounded by a large sea of dark sand dunes that become covered by seasonal carbon dioxide frost.
NASA/JPL/University of Arizona

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Date

14/05/2008
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Source

NASA
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Copyright info

Public Domain Dedication (CC0)

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mars
mars reconnaissance orbiter mro
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jet propulsion laboratory
polygons
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high resolution
sand dunes