He was referring to evolution as controversial science. While there may be quite a number of legitimate controversies within the science of biology regarding evolution, evolution itself is not a controversy at all among biologists.Elsewhere JP Cusick wrote:Both religion and controversial science could be taught in elective College courses where they belong.
Question for debate: Is evolution as taught at the high school level, a controversial science? Is there any controversy among currently practicing biologists regarding the basic science behind evolution?