The latest images released by NASA’s HiRISE (High Resolution Imaging Science Experiment) team show ‘Morse code’ dunes on the Martian surface. ‘Morse code’ dunes on Mars. Image credit: NASA / JPL / University of Arizona. The images were captured in February 2016 by the HiRISE camera, an instrument aboard NASA’s Mars Reconnaissance Orbiter (MRO). The shape and orientation of dunes can usually tell us about wind direction, but in the HiRISE...
