This story was originally published on The Conversation. It appears here under a Creative Commons license. Hopewell Ceremonial Earthworks in Ohio was added to UNESCO’s list of World Heritage sites on Sept. 19, 2023. The eight mound complexes that received this designation are spread across central and southern Ohio and were built between the beginning of the common era and the 12th century. The mounds are marvels of Indigenous science and astronomy, which helped Native Americans organize everything from cycles of planting and hunting to their ritual calendar. Two mound…
