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Tests before launch revealed Teflon from the drill can rub off and taint the samples. Some workarounds being considered include baking the samples so that the contaminant is separated out. The team is also pondering switching to a different, gentler drilling mode in certain cases. In the worst case scenario, scientists may have to rely on the scoop to collect soil and Curiosity's wheels to crush rocks into bits. ___ Online:
[Associated
Press;
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