An ATHLETE -- All-Terrain Hex-Legged Extra Terrestrial Explorer -- vehicle stands on the sand, June 10, 2008, in Moses Lake, Wash. NASA says Moses Lake is a perfect testing ground because its soft, powdery soil that is mixed with volcanic ash is similar to lunar dust. The soil forms high, slippery dunes similar to the lunar hills the vehicles will have to climb.
(Photo: AP Photo/Elaine Thompson)
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