When It Was Too Hot for Leaves

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Plants first made their way onto land at least 470 million years ago but for their first 80 million years, leaves as we know them today didn’t exist. What held them back?

Thanks to Franz Anthony (https://franzanth.com) for the excellent reconstruction of early Devonian megaphyll leaves!

Produced by Complexly for PBS Digital Studios

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References: https://docs.google.com/document/d/18...