An Ancient ‘Horizon Calendar’ Comes Into View Over Mexico City

Calendars, Leap Year, Aztecs, Archaeology and Anthropology, Space and Astronomy, Sun, Research, Indigenous People, your-feed-science
Scientists suggest in a new study that ancient Mesoamericans tracked leap years using a sunlit horizon.

By BY BECKY FERREIRA from NYT Science https://ift.tt/XN32dfR