Answer :
Because scientists are not the smartest people in the world and technology is not aged enough to do those kinds of things to figure it out. Also, ( I am a christian) God says in the bible that there are things that we will never understand but him.
i think that, science cannot answer all questions because science doesnt always go the right way that you want it to, because even science and everybody makes mistakes and messes up, and science is not a mind reader. and science can DEFINETLY make wrong answers some times.and even very smart scientists can even mess up and make something wrong.and dont trust everything that you think that you can fully depend and trust.