And when did that occur? Science operates on available evidence. Nowhere does science claim that available evidence is all there is. It implicitly claims otherwise, in fact, in holding to the principle of fallability, and requiring critical experiments, rather than experiments designed to confirm.
You raise a very good point. We have a culture -- especially our education system -- based on the assumption of the totality of materialism. Proponents of this view succeeded by claiming to speak with the authority of science. True science does not presume that the spiritual does not exist or is irrelevant.