Spirit, the Mars Rover, Left to Die Before Its Time

The brave, unflagging Mars rover Spirit, who has lived on the Red Planet for almost four years, has been given a death sentence by the U.S. government. Right now, the little robot is resting on a sunny slope, waiting out the winter and preparing to do more tests on the Martian atmosphere. But now it looks like Spirit… » 3/25/08 7:00am 3/25/08 7:00am