'Extreme analytical chemistry' will help unravel Mars' mysteries

Sam Kounaves is spearheading the chemical analysis of Martian soil and ice for the NASA Phoenix Mars mission that will launch in early August and land on Mars next May. Kounaves examines big questions of planetary science by applying "extreme analytical chemistry" to harsh environments like Death Valley, Antarctica -- and now Mars. He says Mars holds vital clues to climate change on Earth.

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