Researchers have been studying the dynamics of how crescent-shaped sand dunes are formed. Known as barchans, these formations are commonly found in various sizes and circumstances, on Earth and on ...
This observation shows a small sand dune field on the floor of Newton Crater, an approximately 300-kilometer wide crater in the Southern Hemisphere of Mars. The image shows both dome and barchan dunes ...
On the west (left) side of this image from NASA’s Mars Reconnaissance Orbiter, fairly textbook-looking barchan sand dunes sit atop the bedrock. Barchan dunes pointing in the opposite direction are ...
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