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José Iriarte, Professor of Archaeology, University of Exeter

Great mysteries of archaeology: an ancient Amazonian world revealed from the sky

From the air, you see it only through the constant jolt, tilt and shudder of the low-flying Cessna aircraft. The landscape of the Llanos de Moxos, northern Bolivia, appears as a disconnected patchwork of open grassland savannahs, forest islands and lakes.

It feels random, almost unreadable. Only gradually does the pattern resolve itself: raised causeways or paths fanning out to link the forest islands, and a dense, scattered web of canals threading the terrain. Slowly you realise it’s a structured network of intersecting lines, enclosures and roads – the imprint of past human design.

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