Indeed, but Riemann did that for his habilitation, which is a step after his Ph.D.. If he'd spent math class questioning fundamental postulates, he's have never gotten his primary degree. Research is really only possible when you already know the field.
There is no fundamental truth to evolution. There is no how, there is no observation, there is not even a stable theory like in most sciences. All there is is a lot of verbiage. Evolution is not science, it is an ideology. An atheistic/materialistic ideology which like all other ideologies has to back up its tenets with force instead of facts. That is why it must tyrannize everyone that disagrees with it - because the evo emperor has no clothes and if people start saying it the whole hoax will be over and the prostitutes of evolution will be out of work.