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Researchers Uncover 2,000-Year-Old Maya Water Filtration System.
The city of Tikal purified one of its reservoirs with technology comparable to modern systems.
Evidence for the oldest known zeolite water purification filtration system occurs in the undisturbed sediments of the Corriental reservoir at the Maya city of Tikal, in northern Guatemala.
By Kenneth Barnett Tankersley, et al