God of the Gaps
Throughout human history, unexplained phenomena have been attributed to the work of divine beings. Lightning, rain, the movement of the planets, earthquakes, and other phenomena that were not explainable by the science of the time were called miraculous. Anywhere there was a gap in our knowledge, god was used to plug the gap. This "god of the gaps" approach used to be an accepted method of explaining what we don't yet know.
However, there are problems with this approach. First, the extent of the god's miracles decreases as scientific knowledge increases. The more we explain by science, the less we need god as an explanation. God shrinks as science grows. Is that the kind of god anyone would want?
Second, the use of god to explain unknowns explains nothing. God's powers and how they work are a mystery too, so explaining a mystery with another mystery is no explanation. An explanation is supposed to clarify and extend knowledge. Attributing a phenomenon to the magic powers of a supernatural being does neither.
Third, the "god of the gaps" approach assumes that science will never explain the phenomenon in question. This is rather arrogant, especially given the progress science has made in the last one hundred years. Pessimism about science should not lead us to use supernatural "explanations." As the old god explanation is replaced by scientific knowledge, one might wonder what other uses of the "god of the gaps" will also be discarded in the future. Can we ever be sure that the god explanation for a given phenomenon will never be replaced? It seems unlikely. We have many examples where the god of the gaps explanation failed. Who still believes that lightning occurs by magic powers?
The "god of the gaps" approach has been tried in the past, and its track record is poor. If we don't know how something happens, we should admit that we don't know. That is the honest approach, and in the case of scientific explanations, this has been shown historically to be the best approach.
