Yes, there are unexplained things mentioned in many old civilizations but only some remains true or justifiable. Like you would have witness that in 2012 there was common misconception that world is going to end on 2012 according to Mayan calendar.
So till now, i have only find this thing in Islam, that whenever its talks of something in terms of physical world, it has not been proven wrong.
RE: An infidel reading the Quran #3