Origin of the Mesoamerican 260-Day Calendar

@article{Malmstrom1973OriginOT,
  title={Origin of the Mesoamerican 260-Day Calendar},
  author={Vincent H. Malmstrom},
  journal={Science},
  year={1973},
  volume={181},
  pages={939 - 941}
}
The sacred 260-day Mesoamerican calendar probably originated near a latitude of 15 �N, where there is a 260-day interval between transits of the zenithal sun. Archeological and faunal evidence favors an origin in the Pacific lowlands rather than in the highlands near Cop�n, Honduras, although Cop�n, which is located at the 15th parallel of latitude, later became the principal Mayan astronomical center. 
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