Tree time!

My favorite dendrograms (randomly ordered)

The first-known sketch by Charles Darwin of an evolutionary tree describing the relationships among groups of organisms (Notebook B: Transmutation of species, 1837-1838). This tree figure, with the most ancestral species at the bottom and their descendants branching off, reveals that Darwin understood all plants and animals are related. Above this tree Darwin wrote firmly, "I think."

Lentebloesem (Spring Blossom) 1987; the Dutch painter René Daniels depicts his own oeuvre as a branched tree, which leaves are formed by the titles of his previous paintings.

Ribosomal RNA gene based phylogenetic tree by Carl Woese (1987) illustrating the three-domain classification system.

W. Ford Doolittle’s reticulated tree, or net, stresses the importance of horizontal gene transfer in archaeal and bacterial evolution.

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