They practised their own forms of hieroglyphic writing and even advanced astronomy .
Like the Mississippian peoples of North America such as the Choctaw and Natchez , the Maya organized themselves into large , agricultural communities .
peoples practised peoples ' own forms of hieroglyphic writing and even advanced astronomy .
Like the Mississippian peoples of North America such as the Choctaw and Natchez , the Maya organized themselves into large , agricultural communities .