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Hundreds of never-before-seen ancient ‘earthworks’ discovered in the Amazon
Many of these structures date to around C.E. 100–300, during the time of the Aquiry civilization, and may have been used for ceremonial purposes
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nature.com
Amazonian earthwork survey indicates ancient population was much larger than thought
The Aquiry civilization comprised between 1.25 million and 3 million people around AD 100–300.
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Over 20,000 precolonial earthworks in the Southwest Amazonia - Nature
Using canopy-penetrating LiDAR data, the northern part of southwestern Amazonia appears to contain as many earthworks as previously estimated for the whole of Amazonia.
