<p>Monitoring Changes among Russell Crater Dunes and Gullies — This area is a favorite to look for changes over time. These gullies have been formed by the defrosting of carbon dioxide ice.
</p><p>NASA/JPL/University of Arizona (254 km above the surface, less than 5 km across)
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<a rel="nofollow" class="external text" href="https://www.flickr.com/people/71688597@N05">UAHiRISE (NASA)</a>
2018-05-02 09:21
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