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Collapse: Why Do Civilizations Fall?
A site that explores the decline of four ancient civilizations: the Maya, the early civilization of Mesopotamia, Chaco Canyon (the Anasazi of the Southwestern United States), and the Mali and Songhai of western Africa. The methods used by archaeologists to understand why these particular civilizations collapsed are also presented. From Annenberg Media.
http://www.learner.org/interactives/collapse/

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