[REVISION HISTORY]

Amazon pre‑Columbian civilization mapped by LiDAR

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2026-08-03 06:03 UTC → 2026-08-05 13:07 UTC · added ~~removed~~

Airborne LiDAR surveys continue to overturn the notion of the Amazon as an untouched wilderness. A July 2026 Colombian study published on 29 July mapped a vast system of straight, elevated pre‑Hispanic roads, platforms, ceremonial mounds and exchange zones hidden beneath the dense canopy. The high‑resolution 3‑D maps show how these pathways linked settlement clusters, agricultural fields and religious sites, indicating coordinated planning and regional integration far beyond earlier assumptions. In parallel, a Brazilian‑Finnish LiDAR effort reported on the same day documented 432 earthwork structures across Acre and Amazonas, and projected 24,000‑30,000 similar monuments across roughly 183,000 sq km of rainforest. These geometric ditches, embankments and ceremonial enclosures belong to the previously termed Aquisition civilization, which flourished from about 600 BCE to 850 CE and may have supported 1.25‑3 million people at its peak (100‑300 CE). A new international study led by Martti Parssinen of the University of Helsinki, published in *Nature*, expanded the picture to a broader “Aquiry” (also spelled Aquisition) civilization spanning present‑day Brazil, Peru and Bolivia. Over 400 preserved sites were identified, and the authors estimate more than 20,000 ceremonial and infrastructural structures across the same 183,000 km², representing less than 3 % of the Amazon basin. The paper further refined population estimates to 1.25‑3 million and emphasized that many additional sites likely remain undiscovered. Further analysis released on 1 August 2026 added 396 previously unknown earth‑works, bringing the total of identified structures to as many as 30,000. The same *Nature* article reiterated the 20‑30 k monument estimate and a peak population of 1.5‑3 million, underscoring the scale of landscape modification and the sophisticated planning of a densely inhabited, culturally complex Amazonian landscape. In early August 2026, the same LiDAR team published a detailed account of a 4,500 km² survey in the Brazilian state of Acre.

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