A few weeks back we had a nice shot of a set of dust devils. Now the Astronomy Pic of the Day shows us that dust devils also occur on MARS.
Astronomers would sometimes notice new dark trails on the surface. Finally they figured out that these were left by dust devils, and in this shot there is actually a dust devil - on top there, climbing that incline. Martian dust devils can be up to 8 kilometers high. Damn.