A curious prehistoric site on a hilltop in northern Ohio may reflect the spiritual cosmology of the ancient hunter-gatherer people who built the site around 2,300 years ago, according to a new study. The so-called Heckelman site, located near the town of Milan, in Ohio’s Erie County, is on a flat-topped bluff above the Huron River. There, people of the “Early Woodland” period of North American prehistory erected tall, freestanding wooden poles as part of the group’s social or religious ceremonies. Archaeologist Brian Redmond, a curator at the Cleveland Museum of Natural History, said the location of the site appeared to echo a conception of the cosmos common to many Native American peoples