Leaf Pores Clue to Ancient Carbon Dioxide (IMAGE)

Southern Methodist University

Leaf Pores Clue to Ancient Carbon Dioxide

Caption

Researchers measured and counted the leaf pores and epidermal cells on well-preserved fossil leaves from the Highlands of Ethiopia to determine the concentration of carbon dioxide present in the Earth's atmosphere 22 million years ago and 27 million years ago. (Credit SMU)

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SMU

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