“Advocates for a single line of progress encounter their greatest stumbling block when they try to find a smooth link between the apparently disparate designs of the invertebrates and vertebrates.”

—  Stephen Jay Gould , book Leonardo's Mountain of Clams and the Diet of Worms

"Brotherhood by Inversion", p. 320
Leonardo's Mountain of Clams and the Diet of Worms (1998)

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Stephen Jay Gould 274
American evolutionary biologist 1941–2002

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