I have to acknowledge that Graham Hancock knows what he talks and writes about. He goes to the places he writes about, he studies the history of the place and the people, he interviews anyone and everyone he can regarding the subject (and he has written on many.) I'm presently reading this gem, "Magicians of the Gods" as successor for his wildly successful "Fingerprints of the Gods" years ago. I've always felt that Mankind has been on Earth in civilized fashion much longer than conventionally believed. I'm not shocked or surprised at the evidence (yes, call it that, now) of ice age civilizations that were destroyed, suddenly it seems, in a catastrophic event that stopped the warming period ending the ice age and initiated another mini-ice age called the Younger Dryas, beginning about 12,800 years ago. This coincides with the sudden demise of the great mammals.
It's a fascinating detective story, more the remarkable since it rings of truth. Why such discoveries and knowledge is forbidden by so many baffles me.
More about it all HERE.