Sand dunes on Mars can appear exotic. The dark dunes above might be compared to shark's teeth or chocolate confections . In reality, they arise from the complex relationship between the sandy surface and high winds on Mars. These particular dunes are located in Proctor Crater , a 170 kilometer wide crater first seen to house sand dunes by Mariner 9 more than 25 years ago. MGS will now be deployed to study particularly interesting regions of Mars in more detail.
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