> It's hard to conclusively prove or disprove this hypothesis given the difficulties in reliably dating stone artifacts. And if such civilizations did exist, mu

> It's hard to conclusively prove or disprove this hypothesis given the difficulties in reliably dating stone artifacts. And if such civilizations did exist, much of the evidence has probably been inundated by rising sea levels making it extremely difficult for archaeologists to find. Why is evidence for that theory more difficult to find and date than evidence for the prevailing theories (which has been found, of course)?