Slope Streaks

This image from the HiRISE camera aboard the Mars Reconnaissance Orbiter (MRO) shows streaks of dark-colored material lining the walls of a trough (left side) and tapering out onto its floor. One of the few currently active geologic processes on Mars, this streaking may be caused by finely-grained soil moving downhill in much the same…

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Southern Dunes

  Here’s an exceptionally beautiful image taken by the HiRISE camera on the Mars Reconnaissance Orbiter showing rippling dunes within a crater on Mars’ southern hemisphere. The way the dunes are lit reminds me of a Salvador Dali painting, the central area reminiscent of the lower part of a human face. The brightest areas are…

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Written in Stone

This image from the HiRISE high-resolution camera on board the Mars Reconnaissance Orbiter (MRO) shows multiple layers of exposed sedimentary rock on Mars in a region known as Arabia Terra. Referred to as “cyclic bedding” by geologists, this pattern of layering is caused by repeated fluctuations in the amount of sediment available to create new rock…

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