NASA's Mars orbiter snapped this image of Curiosity trucking along down at the surface

The Curiosity Mars rover covers a lot of ground for a robot that only moves at a max speed of .1 mph. A photo snapped recently by NASA's Mars Reconnaissance Orbiter provides a pretty cool visualization of what the rover has been up to so far this year, showing the tracks Curiosity left behind as it journeyed from its previous science target -- an area called the Gediz Vallis channel -- to its next destination. The rover itself is just a tiny speck at the front of the roughly 1,050-foot-long trai...