Shiney McShine what you are talking about is adaptation as opposed to evolution. They can be very separate and I do believe in adaptation. There is no doubt in my mind on that score. For the record I have researched evolution but there is a small flaw in the theory.
Where did life come from? Originally the argument was that simple chemicals formed bonds etc (I am no scientist) and worked together and became life. Now scientists have proved life needs to come from life i.e. non living matter can not become living. So were did the life come from?
