In ''When the sky fell: In search of Atlantis'' (1996), Rand Flem Ath<ref>http://www.flem-ath.com</ref> expanded on Professor [[Charles Hapgood]]'s theory of crustal displacement whereby the entire earth's crust moved with respect to the core. The suggested date for this was about 10,000 years BC. If a displacement had occurred then it would have caused enormous disruption to the the earth's oceans with massive tsunamis and heavy rain. Although the book was nominally about the disappearance of [[Atlantis]], the theory of crustal displacement not only explains the discrepancies in ice thickness in [[Greenland]] and [[Antarctica]] but also the sudden demise of the [[mammoth]]s. This theory could also potentially explain the widespread existence of flood accounts throughout different cultures. | In ''When the sky fell: In search of Atlantis'' (1996), Rand Flem Ath<ref>http://www.flem-ath.com</ref> expanded on Professor [[Charles Hapgood]]'s theory of crustal displacement whereby the entire earth's crust moved with respect to the core. The suggested date for this was about 10,000 years BC. If a displacement had occurred then it would have caused enormous disruption to the the earth's oceans with massive tsunamis and heavy rain. Although the book was nominally about the disappearance of [[Atlantis]], the theory of crustal displacement not only explains the discrepancies in ice thickness in [[Greenland]] and [[Antarctica]] but also the sudden demise of the [[mammoth]]s. This theory could also potentially explain the widespread existence of flood accounts throughout different cultures. |