Sand Dunes on Mars Shift From Season to Season

Mars’ gravity makes it an amazing place to find some of the biggest landscapes in the solar system.  Those would include the solar system’s biggest sand dune – one that resides in Russell crater.  Now, a team of scientists led by Dr. Cynthia Dinwiddie noticed something unique about the sides of this massive dune.  Occasionally gullies form along its surface. Dr. Dinwiddie’s novel explanation for this phenomena – boulders of CO2 rolling down the dune’s surface.

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