However, the significant decline in belief in a personal God does indicate a weakening of religious beliefs among scientists. The purpose of science is to investigate how the natural world works. Science can consider only natural mechanisms as explanations for the natural world. Science has no competence to investigate supernatural phenomena and has nothing to say about the supernatural. Because science has nothing to say about the supernatural world does not mean that it denies the supernatural world.
Science is by no means unique in having nothing to say about the supernatural world.
Of course, scientists are under more pressure than most groups to clarify their thoughts on the supernatural. After all, supernatural explanations are seriously proposed for several large phenomena for which scientists are actively pursuing natural explanations, e.g. the origin of life, the origin of human consciousness, etc. But it does not follow, if a natural explanation is found for a phenomenon that previously was accounted for by a supernatural explanation, that the general supernatural realm is thereby invalidated. The philosophy of materialism claims that everything in the universe results from the properties of matter and energy. A materialist cannot believe in the supernatural.