Peppered Moth: How Evolution's Poster Child Became the Rebuttal

It has been called one of the best examples of evolution observed in the wild -- light colored peppered moths (Biston betularia) became dark colored in response to 19th century industrial pollution darkening the birch trees in their environment. Evolving a darker color helped camouflage the moths, and keep them hidden from predatory birds. And more recently, air pollution reductions lightened the environment and with it, the moths also began to revert to their lighter color.

Proof of evolut...