In Pictures: What is so infinitely cool about Mars...
This image from Curiosity shows details of rock texture and color in an area where the rover's Dust Removal Tool (DRT) brushed away dust that was on the rock. Fractures, white veins, pits and tiny dark grains in the rock are visible, as well as remaining clumps and specks of dust. The scale bar at lower left is 2 millimeters (0.08 inches). - See more at: http://www.networkworld.com/slideshow/89077/what-is-so-infinitely-cool-about-mars.html#slide17
In Pictures: What is so infinitely cool about Mars?