In fact, the biologist Theodor Dobzhansky once wrote that nothing in biology makes sense except in the light of evolution. Much research in genetics, ecology, and medicine is based on evolutionary theory. Observing that evolution has occurred is relatively simple. Explaining how and why evolution occurs is more difficult. But the revisions do not mean that evolutionary change itself is debatable or that evolutionary theory is merely a collection of vague hunches that are not supported by evidence.
Evolutionary change is undeniable.
Evolutionary theory is a collection of carefully researched and tested hypotheses about how evolutionary change occurs.