Shifting Cataclysm/Pole Reversal (Hancock)

The Cataclysmic Pole Reversal Theory is the theory that the earth's magnetic poles have rapidly changed in the past and caused advanced ancient civilizations to be lost when they all died during the cataclysmic event. The complete lack of any direct physical evidence of this advanced civilization having ever existed is said to be because the remains of the civilization are hidden beneath the ice of Antarctica.