The reconstruction of the Tree of Life has been a primary goal in biology since Darwin coined the expression, the “great Tree of Life” in On the Origin of Species: “The affinities of all the beings of the same class have sometimes been represented by a great tree. I believe this simile largely speaks the truth. The green and budding twigs may represent existing species; and those produced during each former year may represent the long succession of extinct species….As buds give rise by growth to fresh buds, and these, if vigorous, branch out and overtop on all sides...

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