How a centimeter of clay in a 1,300-foot layer of rock in Italy explains one of the most important days in the <strong>history of life</strong>

How a centimeter of clay in a 1,300-foot layer of rock in Italy explains one of the most important days in the history of
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How a centimeter of clay in a 1,300-foot layer of rock in Italy explains one of the most important days in the history of life

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News source: Arts & Letters Daily

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