The discoveries are speeding up. There seems to be good evidence that the same type of megalithic structures were built in various places (Peru, Egypt, Turkey) around the world around 12,000 years BC. The builders were remarkable engineers, were able to move 200 ton blocks of granite and join them without any adhesive, and they seemed remarkably uniform in their approach to design. The emerging consensus is that these civilizations were wiped out by a massive flood, perhaps sparked by a comet or asteroid strike.
This was and still is complete and utter nonsense.