SpiritNASA’s Spirit Mars rover becomes stuck in an area of soft, dusty soil in which its wheels can no longer gain traction. Efforts to simulate the problem on Earth begin, as well as studies to see if Spirit can free itself, but attempts to wiggle or rotate the rover’s wheels on Mars produce no results (and eventually wear out the independent motor of another of its wheels). The attempts to free Spirit from its Martian sandtrap continue through early 2010.