[simonh]

That definition of supernatural, as just the as-yet unknown natural, is a bit contentious and I've not seen it commonly (ever) espoused by anyone else. Most people who use the term really do seem to mean, on questioning, something beyond and different from the knowable natural world and it's forces. Sometimes they will even classify it as things by definition unknowable to science.

I do agree that many if not most 'supernatural' phenomena have been explained by science. However I don't think that it's all that useful to classify them as supernatural at a previous time and natural now. They haven't changed.