Easy to see that the rover has bottomed out on a rock or dirt pile. If this was a car here on Earth, it would be similar to getting your oil pan punctured on a rock or hung up on a log. No logs on Mars or oil-pan on an engine of the rover to bust, so the rover is just hung there for now. JPL rover drivers are still working with a duplicate rover here on Earth to figure out a way to get Spirit unstuck and driving again.
| JPL Rover site |