Observing Evolution: Peppered Moths and the Discovery of Parallel MelanismThe extraordinary tale of the humble peppered moth is at the very foundation of our acceptance of Darwinian evolution. When scientists in the early twentieth century discovered that a British population of the small Biston betularia had rapidly changed in its appearance as a result of the industrial revolution becoming black in response to its newly sooty environment over the course of mere decades the revelation cemented Darwin's theory of natural