The Curiosity rover drilled a 2.5-inch-deep hole into Martian rock, successfully producing powder for laboratory analysis. Using the drill on Mars was "the biggest milestone accomplishment for the Curiosity team since the sky-crane landing last August," said John Grunsfeld, NASA's associate administrator for the science mission directorate. NASA researchers are using the rover to collect and test samples on the Red Planet to determine whether the planet can sustain microbial life.

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