What is the supernatural existence of Synchro Monsters?

So for the entire game in the Yu-Gi-Oh! series has proven it's origins. But synchro monsters come in as some great importance. I mean there are cards that never given a supernatural origin, at those cards were never treated as being important in the tv series. Synchro gain there importance, but have no clear origin. Does anyone know they're supernatural origins in Yu-Gi-Oh! 5D's. No answers that have nothing to do with the question or the will be reported. But if they do go right ahead.