Evolutionary biologists are not content merely to explain how variation occurs within limits, however. They aspire to answer a much broader question-which is how complex organisms like birds, and flowers, and human beings came into existence in the first place.
“More negatives write than call. It's a cheap shot for me to go on the air with the critical letters or E-mail I get because the reaction of the listeners is always an instantaneous expression of sympathy for me and contempt for the poor critic.”