No amount of scientific investigation can disprove the possibility of miracles. Science will tell you precisely what will happen so long as the laws of nature are in operation. Miracles by definition are events in which the laws of nature are suspended – where for whatever reason they have ceased to operate.
Science can’t tell you that a man cannot walk on water; it can only tell you that a man walking on water is not acting under the regulations of the laws of nature.
Science studies only how nature behaves in and of itself, therefore it cannot tell you anything about what exists outside of nature.
Science examines what events nature can produce. Any other event, if nature is incapable of resourcing it, will need to be resourced by something beyond nature. Does anything exist beyond nature? Science doesn’t know! All science knows about is nature.