<p>A Dust Devil on Hilly Terrain – In addition to exposing darker subsurface material, dust devils on Mars have helped to clean off the solar panels of our rovers, which has helped keep them going. 
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NASA/JPL/University of Arizona (<a rel="nofollow" class="external text" href="http://www.uahirise.org/PSP_009819_2130">www.uahirise.org/PSP_009819_2130</a>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uahirise-mars/32940830725/">PSP_009819_2130</a>