4.1-Billion-Year-Old Martian Meteorite Is A "Rosetta Stone" For The Red Planet's Distant, Watery Past
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4.1-Billion-Year-Old Martian Meteorite Is A "Rosetta Stone" For The Red Planet's Distant, Watery Past

The space rock, recovered from the Sahara Desert in Mali, is easily the oldest igneous rock we know of from Mars.