90 "polar shift. "In 1852, mathematician Joseph Adhemar suggested that the accumulation of thick ice at the poles periodically caused the earth to flip and the equator to move to where the poles were. An early mention of a shifting of the Earth's axis can be found in an 1872 article entitled "Chronologie historique des Mexicains" which interpreted ancient Mexican myths as evidence for four periods of global cataclysms that had begun around 10,500 BC. The novel Geyserland: Empiricisms in Social Reform. Being Data and Observations Recorded by the Late Mark Stubble, MD, PhD. (1908) by Richard Hatfield used the device of a fictional study to locate a blissful nation of pure Communism at the North Pole on the island of Atlantis. This fictional Utopia was destroyed by a pole shift set in 9262 BC. Hugh Auchincloss Brown, an electrical engineer, advanced a theory of catastrophic pole shift influenced by Adhemar's earlier model. Brown also argued that accumulation of ice at the poles caused recurring tipping of the axis. identifying cycles of approximately 7 millennia.