Temperate Earth (IMAGE)

University of Washington

Temperate Earth

Caption

The study significantly narrows the possible temperature of the early Earth to 0 to 50 degrees Celsius. It also finds the ocean's pH has remained fairly moderate, gradually increasing from a slightly acidic initial value of about 6.6, through the neutral value of 7.0, to today's slightly alkaline seawater of about 8.1.

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Joshua Krissansen-Totton/University of Washington

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