Evolution is a factual entity on the planet Earth. It is no more a piece of science than the fact that Liverpool are in the Premier League, or that (to me at any rate) my left eyeball is to the left of my right eyeball. All the science in evolution comes in its explanation, not in the fact of its existence (which is irrefutable). Every single piece of explanation of evolution must be, and is, vulnerable to refutation. Your piece of guff about the Cambrian explosion, along with everything else you say about science, demonstrates that you do not have the faintest inkling of what science is all about.