NASA - National Aeronautics and Space Administration

Dark spots (left) and 'fans' appear to scribble dusty hieroglyphics on top of the Martian south polar cap in two high-resolution Mars Global Surveyor, Mars Orbiter Camera images taken in southern spring. Each image is about 3-kilometers wide (2-miles).

Image Credit: NASA/JPL/Malin Space Science Systems

+ High resolution JPEG