Why would they run out of explanations? All that leads to is "we don't know why yet, but we'll think of something".
And maybe trying to get funding for a bigger particle accelerator.
Proving things to 100% certainty requires running out of explanations. Proving things to reasonable certainty only requires running out of reasonable explanations, and that's certainly possible. And the latter is all that people mean when they speak of science proving something--science never proves anything to 100% certainty anyway.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.