This may look like an elaborate tattoo, but it is actually a Martian windstorm. .. The photo shows twisting dark trails criss-crossing with lighter coloured terrains that cover the surface of Mars. The dark trails are the result of miniature whirlwinds known as dust devils: spinning columns of warm air that rise and become visible as they pick up... - http://getbiglittlekid.tumblr.com/post...