HOW CAN WE know who we are if we don’t know where we come from? It is clear from many fragments of evidence, traditions and lore that we have an incomplete picture of the earliest days of human civilization. It’s possible that whole civilizations, some with advanced technology, have come and gone. At the very least, human culture reaches much further back in time than conventional history admits. There are many mysteries in our ancient past, but there may be clues to that past around the world in the form of sunken cities, ancient structures, cryptic hieroglyphics, artwork and more.