In the week before Halloween, NASA's Mars rover Spirit had another computer memory glitch, failing to perform some science observations, or failing to report the results to Earth. Spirit had a string of four similar incidents last April.
Spirit has also been stuck in deep Martian sand for months. NASA has yet to find a way to free the rover. Aside from the occasional computer glitch and being stuck, however, engineers report Spirit continues to function well after nearly six years on the Red Planet. Those might seem to be two big asides, but Spirit's mission was originally to last only 90 days in 2004, so making too much of problems today would miss a much bigger point.
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