Problems in the Statistics of Urban Agglomeration: The growth of urban areas has made necessary new concepts and reformulations in social statistics
Rice, S.A.
Science 128(3332): 1111-1114
1958
ISSN/ISBN: 0036-8075 PMID: 17835846 DOI: 10.1126/science.128.3332.1111Document Number: 427171
The sacred 260-day Mesoamerican calendar probably originated near a latitude of 15 degrees 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 Copán, Honduras, although Copán, which is located at the 15th parallel of latitude, later became the principal Mayan astronomical center.