A non-fiction book by Graham Hancock that proposes the existence of an advanced ice-age civilization that was wiped out by a cataclysm, leaving behind traces in ancient myths, monuments, and maps.
if these people like Graham Hancock and Randle Carlson are correct and these folks that believe in the younger dus impact theory
""The speaker mentions "Graham Hancock" in the context of the Younger Dryas impact theory and lost ancient civilizations, which is a central theme in his popular works."