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LOS ANGELES — Spirit, the scrappy robot geologist that captivated the world with its antics on Mars before getting stuck in a sand trap, is about to meet its end after six productive years.
Spirit has been incommunicado for more than a year despite daily calls by NASA. The cause of Spirit’s silence may never be known, but it’s likely the bitter martian winter damaged its electronics, preventing the six-wheel rover from waking up.
Project manager John Callas of NASA’s Jet Propulsion Laboratory said the last commands will be sent up today.



