31. Martian dust devils leave dark "tracks" in their wake where they've removed dust from the planet's surface. Looks like abstract art. http://pic.twitter.com/QmfrFqfGM6
— Tanya Harrison (@tanyaofmars) July 14, 2017
via Twitter https://twitter.com/tanyaofmars
July 15, 2017 at 05:20AM
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