Bok
05-16-2018, 11:21 AM
Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years.
More... (http://www.nasa.gov/image-feature/jpl/pia22349/gullies-of-matara-crater)
More... (http://www.nasa.gov/image-feature/jpl/pia22349/gullies-of-matara-crater)