Can I just point out that nothing in science is ever "absolutely proven" - science deals in probabilities, not absolutes. You can only ever definitively disprove a theory.
The Theory of Evolution is as well supported as any scientific theory. That is, it makes testable predicitions and has lots (in the case of evolution, mountains) of evidence to support it and no evidence to disprove it. If the theory as strong, with as much supporting evidence as Evolution, then scientists may refer to it as "proven" or "fact", as shorthand for saying that it is extremely well supported.
All science can really say is something along the lines of:
At the moment, with the evidence collected so far, this is the best explanation or model for observation or phenomenon X.
If evidence comes to light that conflicts with the prevailing theory, that theory must be modified to account for the new evidence or, if it cannot, be discarded.
Crucially, this is the great strength of the scientific method. That it does not blindly follow a set dogma, but is willing to change as new evidence is discovered. It might be slowly and reluctantly in some cases, but change it will.
As for Evolution, I struggle to imagine a scenario where it could be disproven, but it is possible. If a theory cannot, in principle, be disproven (i.e. it's not falsifiable) then it's not science.
In the meantime I accept Evolution as the best and most likely explanation for the diversity of life on Earth.