NASA has captured images showing sand dunes on Mars shifting over the course of several years.
Taken by the Mars Reconnaissance Orbiter, the photographs clearly show how the Martian winds are pushing the sand as much as 3 meters in some places. "Mars either has more gusts of wind than we knew about before, or the winds are capable of transporting more sand," said planetary scientist Nathan Bridges.
"NASA’s Mars Reconnaissance Orbiter has caught sand dunes on the surface of Mars in the act of shifting."
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