The Mars Rover "Spirit" captured a number of dust devils traveling across the plains of Gusev Crater. These dust devils are suspected in "cleaning events" that have removed dust from the rover's solar panels, allowing it to gather more energy each day and increasing its life on Mars.
cool animated gif:
http://marsrover.nasa.gov/gallery/pr...68b-B558R1.gif
cool animated gif:
http://marsrover.nasa.gov/gallery/pr...68b-B558R1.gif
