It is your misunderstanding of what Science is that is keeping you stuck. Atheists like myself understand that Science is fallible. Scientists themselves understand that Science is fallible. That is why they keep experimenting and experimenting. They're always arguing and disputing previous theories to keep testing that previous studies came up with correct conclusions. So when you see that, that is a sign that there is healthy science going on. In Science, they seek to find truth by what evidence and reason suggests. That is the nature of Science.