All the dirt on an ancient earthen mound
Friday, February 1, 2013 - 16:20
in Earth & Climate
The enormous earthen monument Poverty Point, built on a Mississippi River bayou some 3,200 years ago, is an impressive feat of engineering. Hunter-gatherers moved more than 26.5 million cubic feet (750,000 cubic meters) of dirt to create concentric ridges and several large mounds in what is today northern Louisiana.