'Pristine' Amazonian region hosted large, urban civilization, study finds

They aren't the lost cities early explorers sought fruitlessly to discover. But ancient settlements in the Amazon, now almost entirely obscured by tropical forest, were once large and complex enough to be considered "urban" as the term is commonly applied to both medieval European and ancient Greek communities.

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<p><a href="http://www.physorg.com/news139151351.html">'Pristine' Amazonian region hosted large, urban civilization, study finds</a></p> <p>They aren't the lost cities early explorers sought fruitlessly to discover. But ancient settlements in the Amazon, now almost entirely obscured by tropical forest, were once large and complex enough to be considered "urban" as the term is commonly applied to both medieval European and ancient Greek communities.</p>