NASA's Mars Reconnaissance Orbiter caught the first ever image of active avalanches on Mars. They're near the Red Planet's north pole and show tan clouds billowing away from the foot of a slope where ice and dust have just fallen down.
Candice Hansen, the deputy principal investigator for the camera (called HiRISE) said, "we were checking for springtime changes in the carbon-dioxide frost covering a dune field, and finding avalanches was completely serendipitous."
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