A new batch of Mars photos taken by the UA Lunar and Planetary Lab's HiRISE camera aboard the Mars Reconnaissance Orbiter is available online. The upper shot is titled simply "Spider Evolution," while the lower shot features sandy Martian dunes that have been swept by dust devils.
NAU student Addie Hite explains:
This image is located in a crater in the Hellespontus region that displays dunes and dust devil tracks.
The larger barchan-like dunes are surrounded by