Since when does science prove anything? Science takes facts, or observable claims that are definitely true under the axiom that observations are reliable, and attempts to model them. It does not in any way seek to "prove" the model. The model doesn't exist to give you the sense of having gained an understanding of the universe that you can sit on. The model is an extremely tentative thing which is subject to change at the drop of a hat if tests show it to be inconsistent with the facts, and it is simply a tool for making educated predictions.

You can contest scientific theories (models), not with argument, but with contradictory facts. You can also contest facts: Although facts are absolutely true assuming that observations are reliable, if they are not first-hand, they could be lies by the people claiming to have observed them.

When you contest facts, you contest the honesty of people, so be prepared for that if you do so. When you contest theories, do so with contradictory facts, not arguments about proof, because these theories are never claimed to be true, only "good enough" models that are consistent with current facts.