The metal balls in this image are only 2 millimeters in diameter (0.078 inches). The image, which covers an area about 0.5-inch long and is illuminated by four white light-emitting diodes, was taken by NASA's latest and most advanced camera: More »

Read more: http://feeds.gawker.com/~r/gizmodo/full/~3/I8uA2-2a9SI/this-is-how-good-the-next-mars-rovers-camera-is