アメリカ自然史博物館のインスタグラム(amnh) - 11月22日 06時37分

Charles Darwin published only one tree of life in his lifetime, a foldout that appears in On The Origin of Species. But Darwin drew many trees over his career, including this one for primates, the last one he was known to produce, dated April 21, 1868. Scholars suspect that Darwin, not a skilled draftsman, was likely using his trees as a tool for working out relationships in his own mind—a form of thinking out loud.

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