Although the Cambrian explosion of animals is especially striking, it is far from the only “explosion” of new living forms. The first winged insects, birds, flowering plants, mammals, and many other groups also appear abruptly in the fossil record, with no apparent connection to putative ancestors in the lower, older layers of fossil-bearing sedimentary rock. Evolutionary theorist Eugene Koonin describes this as a “biological big bang” pattern. As he notes, “Major transitions in biological evolution show the same pattern of sudden emergence of diverse forms at a new level of complexity. The
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Darwin's theory is pretty untenable...
