I doubt that the laws of physics have changed since the nineteenth century, and since classical Newtonian physics has been found to be inconsistent with established facts, the theory behind Newton's laws was never proven in the first place. Currently, the invariance of the speed of light is under challenge. That principle was never proven either - it is simply consistent with every known physical fact, at least until very recently. You can prove concepts in mathematics, because you can see every detail of logic from the first fundamental assumptions. In trying to understand nature, we can be quite sure about an explanation, but until we see every single detail, we can't say that there are no exceptions to current theory, and it just takes one exception to change a theory.
Human curiosity drives our attempts to understand the workings of nature.
Presenting theories without evidence, twisting evidence to make it support one's personal view of nature, and declaring a human theory to be 'proven' are simply examples of human arrogance.