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by NASA - digital version copyright - © Corbis. All Rights Reserved. - © NASA - digital version copyright/Science Faction/Corbis
Dust Storms on Mars
Early spring typically brings dust storms to northern polar Mars. As the north polar cap begins to thaw, the temperature difference between the cold frost region and recently thawed surface results in swirling winds. The choppy dust clouds of at least three dust storms are visible in this mosaic of images taken by the Mars Global Surveyor spacecraft in 2002. The white polar cap is frozen carbon dioxide. --- Image by © NASA - digital version copyright/Science Faction/Corbis
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