Cycles of the Sun, Mysteries of the Moon: The Calendar in Mesoamerican CivilizationThe simple question "How did the Maya come up with a calendar that had only 260 days?" led Vincent Malmstrm to discover an unexpected "hearth" of Mesoamerican culture. In this boldly revisionist book, he sets forth his challenging, new view of the origin and diffusion of Mesoamerican calendrical systems the intellectual achievement that gave rise to Mesoamerican civilization and culture. Malmstrm posits that the 260 day calendar marked the interval