This image released by NASA on Saturday Feb. 9, 2013 shows a fresh drill hole, center, made by the Curiosity rover on Friday, Feb. 8, 2013 next to an earlier test hole. Curiosity has completed its first drill into a Martian rock, a huge milestone since landing in an ancient crater in August 2012. (AP Photo/NASA)

Associated Press
This image released by NASA on Saturday Feb. 9, 2013 shows a fresh drill hole, center, made by the Curiosity rover on Friday, Feb. 8, 2013 next to an earlier test hole. Curiosity has completed its first drill into a Martian rock, a huge milestone since landing in an ancient crater in August 2012. (AP Photo/NASA)
This image released by NASA on Saturday Feb. 9, 2013 shows a fresh drill hole, center, made by the Curiosity rover on Friday, Feb. 8, 2013 next to an earlier test hole. Curiosity has completed its first drill into a Martian rock, a huge milestone since landing in an ancient crater in August 2012. (AP Photo/NASA)
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