This article address the new spacecraft called Phoenix that is set to take off and land on an unexplored section of Mars, near the north pole. It is set to land this May.
Phoenix is equipped with a trenching tool that can dig down half a meter into the dirt--far lower than the few centimeters of previous missions--and a grinding tool that can penetrate even superhard ice. This mission should bring to light important details about the past geology and climate of the planet. For example, the shapes of particles can reveal whether they were exposed to flowing water, or were repeatedly frozen and thawed, or remained soaking in water for extended periods.
http://abcnews.go.com/Technology/story?id=3439041&page=1
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