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NASA rover preps for 1st test of drilled Mars rock

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LOS ANGELES (AP) — Fresh off drilling into a rock for the first time, the Mars rover Curiosity is prepping for the next step: dissecting the pulverized rock to determine what it's made of. Images beamed back to Earth on Wednesday showed a tablespoon of gray powder in Curiosity's scoop, giving scientists their first glimpse of the sample collected during the drilling nearly two weeks ago....