The El Tajin Period, so named for the great city of El Tajin. Urban centers proliferate and the game of Pok-a-Tok is developed. The Classic Maya Period which saw the height of the Maya Civilization in cities such as Chichen Itza, Palenque, Tikal, Copan and Uxmal.
The process, condition, or result of being covered by glaciers or ice sheets.
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Biological perspective best explains the complexities of human behavior