Let's face it, if we had a time machine we could go back and see how everything got to this point. Of course the rocks can act as a time machine along with biochemical investigations. This is all im trying to say. I have twoquestion. Gravity is a undeniable fact because you can experience it first hand.
Facts are verifiable peices of information.
Evolution is both an observed fact as well as an idea or hypothesis. A fact does not need verification. This is what science is all about. You are still confused. Both try to explain the observed facts in a scientific manner.