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Early Americans’ huge earthworks show off their engineering might

A square hole dug into earth, showing layers of different colours.

Excavation of one of the mammoth ridges at the Poverty Point site in Louisiana revealed discrete layers of earth. Credit: T.R. Kidder

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Nature 597, 307 (2021)



  1. Kidder, T., Kai, S., Henry, E. R., Grooms, S. B. & Ervin, K. Southeast. Archaeol. (2021).

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