Study finds evolutionary link between fins and hands

To help his readers fathom evolution, Charles Darwin asked them to consider their own hands.“What can be more curious,” he asked, “than that the hand of a man, formed for grasping, that of a mole for digging, the leg of the horse, the paddle of the porpoise, and the wing of the bat, should all be constructed on the same pattern, and should include similar bones, in the same relative positions?” By Carl Zimmer.

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