Does the Neo-Darwinian Theory of Evolution Explain the Cambrian Explosion?
We argued that if the theory of evolution is understood according to its textbook definition, namely, “the descent with modification of organisms from a common ancestor, via natural selection and other undirected processes acting on randomly-arising genetic variation” – a definition Wise appears to accept – then that theory does not explain the Cambrian Explosion, the geologically sudden appearance of most animal body plans 540-530 million years ago. We presented multiple lines of evidence in support of our position, some of which can be seen in the handout. Wise disagrees, vehemently – but sorting out why is a bit of a mystery. Take, for instance, his treatment of the fossil evidence. Wise asserts that neo-Darwinian theory predicts we should not expect to find transitional forms between the major animal groups. He writes: We have strong evidence that evolution happens most quickly in small populations. Migrations from these source areas to an area conducive to fossilization then make
