Evolutionary biologists question portions of evolution all the time. This will go on as long as new information and techniques can be applied.
And you COMPLETELY MISS my point while making it for me. Evolutionary biologists have already accepted that evolution is a fact and are just looking for pieces that fit into their puzzle and routinely ignore any that do not yet never once do they stop question the basic premise of evolution.
Here, case in point, in the past in order to "convince" (read that "indoctrinate") people as to the validity of the theory of evolution, they used to use a chart of a horse and some smaller horselike creatures that they claimed were ancestors of the horse in some distant epoch. However, when you carefully examine the skeletons you notice that the creatures gained and lost pairs of ribs at random as it "evolved". As more people began to question this, the evolutionists backed off the validity and eventually the chart used to indoctrinate MILLIONS was discredited as innaccurate.
And how many scientist "prove" evolution is to say, well, this extinct critter looks somewhat (or maybe even a lot) like this living critter, so therefore it evolved from this extinct critter.