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There are a lot of things that happen that you can see or touch or explain, what does science think about that.
One presumes that you missed out the negation on the word "can".
This is a very old throwaway question from creationists which I thought had died out eons ago yet ironically exposes the sheer ignorance and shallow minds of such people. You can't see radio waves or wind but they are easily detected. Everything can be and has been explained quite clearly and factually. For example, supernatural phenomena such as ghosts and God are easily explained by the condition commonly known as delusion.