Native Americans in the U.S. Southwest developed sophisticated skills in astronomy and predicting the seasons, centuries before non-Indian peoples entered the region. In this presentation archaeologist Allen Dart discusses the petroglyphs at Picture Rocks, the architecture of the “Great House” at Arizona’s Casa Grande Ruins, and other archaeological evidence of ancient southwestern astronomy and calendrical reckoning, and interprets how these discoveries may have related to ancient Native American rituals. This program is cohosted by Verde Valley Archaeology Center. This is…