The End of Exploration on Mars?

Built to rove for 90 days, Spirit has lasted six years on Mars. But now it’s stuck and may lose power by May. Even standing still, though, Spirit can do a surprising amount of science, NASA says.
Built to rove for 90 days, Spirit has lasted six years on Mars. But now it’s stuck and may lose power by May. Even standing still, though, Spirit can do a surprising amount of science, NASA says.