From Bears to Whales: A Difficult Transition
bears, blowhole, body temperature, calf (whale), cetaceans, Charles Darwin, Darwinian theory, diving, dolphin, Everhard Slijper, Evolution, floating ribs, fluke, Indohyus, Intelligent Design, James Butler, lungs, mammals, milk, nipple, nitrogen, porpoise, reproduction, Richard Brown, sea lion, sperm whale, submersion, surfactants, testes, the bends, whales
Critics laughed at this, and Darwin removed it from later editions of his book, though he continued privately to believe it. Source