The mystery is far from being solved, but the metephorical meaning is enough for me. Besides, the more we learn, the more questions their are. The mystery is always ongoing. Scientific theories are based on facts, however we don't have enough facts to complete anything, so scientists try to make the most logical assumptions after the facts run out. Their are not enough concrete facts in science to fully explain anything. Their are enough facts to give some insight, but their is not enough evidence to complete any of the stories when we only use science and facts. Reminds me of the 'Based on true events' movies, many of those movies are full of things that are not part of the true events!