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Science Magazine - One Issue Sky Watchers. Maya astronomy, then and now Eight new books that entertain as they challenge assumptions Membranes for petrochemical separations A Head-butting giraffoid from the Miocene Pages 1021-1132 Cover: A 10th-century Maya structure at Chichen Itza, Mexico, is often called the Observatory for its expansive view of the sky and a design seemingly guided by key positions of the Sun, Moon, and planets. The historic Maya anchored their calendars and rituals to celestial events, and their astronomical knowledge is now coming into sharper focus thanks to new analyses of archaeological relics and insights from today’s Maya. Each additional magazine ships for $1 domestically. You have to use the shopping cart to get this discount. Please message with any questions. Ich spreche auch Deutsch. See my other listings for more great items!