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Ancient Observatories
This website about ancient astronomy features exhibitions on Chaco Canyon (New Mexico) and Chichén Itzá, the ancient Mayan city that was located in the Yucatán Peninsula area of Mexico. Features information and activities on seasons, alignments, petroglyphs, Mayan mythology, the Mayan calendar, and related topics. Includes a teacher's guide. From the Exploratorium.
http://www.exploratorium.edu/ancientobs/
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