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sand dune
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sand dunes gypsum dunes sand dunes of the Sahara Death Valley Abu Dhabi: desert erg Fanø Inner Mongolia Martian dune field, as seen by the Viking 1 lander. The dunes on the left bear a close resemblance to sand dunes on Earth. The direction and sharpness of their crests suggest prevailing winds blowing from left to right. The lander's meteorology boom divides the image down the centre. sand dunes on Mars
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sand dune summary
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Photos and Videos

sand dunes
gypsum dunes
sand dunes of the Sahara
Death Valley
Abu Dhabi: desert
erg
Fanø
Inner Mongolia
Martian dune field, as seen by the Viking 1 lander. The dunes on the left bear a close resemblance to sand dunes on Earth. The direction and sharpness of their crests suggest prevailing winds blowing from left to right. The lander's meteorology boom divides the image down the centre.
sand dunes on Mars
How do dunes form and change over time?
See All Videos and Images →

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Quiz
Mt. Elbrusvolcano, Western Caucasus mountain range, Russia. (dormant Russia)
Natural Wonders