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In page Centennial Challenges:
"In this Challenge, teams designed and built robotic machines to excavate simulated lunar soil (regolith).[1] The Challenge was managed by the California Space Authority[2] and was competed in 2007, 2008, and 2009, at which time the Challenge was won by a team from Worcester Polytechnic Institute, which won the US$500,000 prize purse.[3]
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