Drilling For Proof Mars Was Habitable

Credit: NASA/JPL-Caltech/MSSS
This gray powder from inside a Martian “mudstone” contains sulfur, nitrogen, hydrogen, oxygen, phosphorous and carbon—all chemical ingredients for life as we know it on Earth and a major target of the $2.5 billion Mars Science Laboratory (MSL) mission. In a first for planetary science, the mission's...

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