NASA rover Spirit 'revolutionized' how we see Mars

As the Martian rover falls silent for good, JPL scientists mourn Spirit's loss and celebrate its remarkable achievements that continued for years beyond its expected lifetime.It was supposed to roam the surface of Mars for only three months and cover a distance of just a few hundred yards. Instead, NASA's Spirit rover traveled nearly five miles over five years, finding geological evidence that the Red Planet had once been warm and wet enough to have harbored life. Even after it got hopelessly st...

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