The journey should have ended a long time ago on Mars. But somehow the rover Spirit has carried on. It is now having problems with the right front and rear wheel and has been unable to move forward since December 19.
Stay up to date with all things Spirit at the website from NASA called Free Spirit.
The latest update states:
Spirit remains embedded at the location called “Troy” on the west side of Home Plate. Attempts to extricate Spirit have been complicated by the loss of functionality in the right-rear wheel and the lack of meaningful functionality with the right-front wheel.