For anyone who doubts the mechanism by which evolution works I recommend "The Greatest Show On Earth" by professor of evolutionary biology, Richard Dawkins. There's enough food for thought in that single volume to allow any open minded truth seeker to ruminate long enough to compile a counter argument based upon reason rather than dogma. (But I haven't yet seen one!)
I personally tend to apply Occams Razor to theories such as this......the simplest and most straight forward explanation that hasn't been falsified is often the truth! If we posite difficulties in, for instance, the theory of evo