What are these dark spots on Mars' north pole? I was exploring Mars in Google maps and I found these dark spots, like tree shadows on the north pole. I don't have any idea what they might be.



View this in Google maps.
They look similar to the "dark dune spots" of the southern hemisphere, associated with accumulation of melting liquid at the bottom of dunes during warming seasons: https://en.wikipedia.org/wiki/Geyser_(Mars)