Mars dust devils
When dust devils pass over the surface of Mars, they leave dark, crisscrossing streaks on the land. They can cross over hills, run straight across dunes and ripples, and go through fields of house-sized boulders. The dust devils remove bright dust from the terrain, revealing a darker surface underneath.
The dust devils in the photos shown here were recorded by the Mars Exploration Rover Spirit in Gusev Crater on April 15 and 18, 2005.
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