Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years. via NASA http://www.nasa.gov/image-feature/jpl/pia22349/gullies-of-matara-crater
With a high of 62F and a low of 45F. Current temp 40 Current condition Partly Cloudy. Sunrise at April 05, 2018 at 07:04AM sunset at April 05, 2018 at 07:55PM. Humidity 65%.