Aren there controversies among scientists about evolution?
There are many debates within science about aspects of any theory, and scientific theories are constantly being revised as new and compelling information is learned. In evolution, as in all areas of science, our knowledge is incomplete. There are many important debates within evolutionary theory. For example, what features of animals are due to sexual selection as opposed to natural selection? How much of evolutionary change occurs because of the need to adapt to changing environments versus random genetic change? Does natural selection occur only at the level of the individual organism or can it occur also at the level of groups or even species? The list goes on. None of these debates, however, undermines the scientific standing of evolution itself. In fact, each has added to our understanding of the ways in which evolution works, and strengthened the core elements of the theory.
