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Researchers were especially surprised that earthworks in floodplains and uplands were of a similar style, suggesting they were all built by the same culture.
“In Amazonian archaeology you always have this idea that you find different peoples in different ecosystems,” said Schaan. “So it was odd to have a culture that would take advantage of different ecosystems and expand over such a large region.” The first geometric shapes were spotted in 1999 but it is only now, as satellite imagery and felling reveal sites, that the scale of the settlements is becoming clear. Some anthropologists say the feat, requiring sophisticated engineering, canals and roads, rivals Egypt’s pyramids.
The findings follow separate discoveries further south, in the Xingu region, of interconnected villages known as “garden cities”. Dating between 800 and 1600, they included houses, moats and palisades.
“These revelations are exploding our perceptions of what the Americas really looked liked before the arrival of Christopher Columbus,” said David Grann, author of The Lost City of Z, a book about an attempt in the 1920s to find signs of Amazonian civilizations. “The discoveries are challenging long-held assumptions about the Amazon as a Hobbesian place where only small primitive tribes could ever have existed, and about the limits the environment placed on the rise of early civilisations.”
They are also vindicating, said Grann, Percy Fawcett, the explorer who
partly inspired Conan Doyle’s book The Lost World. Fawcett led an
expedition to find the City of Z but the party vanished, bequeathing a
 mystery.
Many scientists saw the jungle as too harsh to sustain anything but small nomadic tribes. Now it seems the conquistadores who spoke of “cities that glistened in white” were telling the truth. They, however, probably also introduced the diseases that wiped out the native people, leaving the jungle to claim – and hide – all trace of their civilisation.
Article by Rory Carroll, Latin America correspondent. guardian.co.uk
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