Seed Fern, <em>Neuropteris ovata</em> Frond (IMAGE)

University of California - Davis

Seed Fern, <em>Neuropteris ovata</em> Frond

Caption

Scientists used fossilized plants, like this seed fern, to reconstruct the ancient atmospheric CO2 record from more than 300 million years ago.

Credit

William DiMichele/Smithsonian Institution

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