“Martian Morse Code” was uploaded to Flickr

This image of dark dunes on Mars was taken on Feb. 6, 2016, by the HiRISE camera on NASA's Mars Reconnaissance Orbiter. These dunes are influenced by local topography. The shape and orientation of dunes can usually tell us about wind direction, but in this image, the dune-forms are very complex, so it’s difficult to know the wind direction. via NASA ift.tt/29nBK4S
embiggen by clicking http://flic.kr/p/JSEKx5
Martian Morse Code was taken on June 27, 2016 at 10:51AM