Better study the methods of science. There are no "proven" theories or "proven facts," not even gravity or electricity. Scientists know evolution is a theory, but unfortunately some with strong religious beliefs make a big deal of this as they think that by labeling evolution a theory they can discredit it. "Its just a theory, nothing to take seriously."
This just demonstrates a lack of knowledge of the workings of science.
See post 21 for an explanation of "a lack of knowledge of the workings of science".