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News Link • Archaeology

Mysterious Human-Created Structures Are Older Than The Amazon Rainforest

• Business Insider

These human-made structures remain a mystery: They may have been used for defense, drainage, or perhaps ceremonial or religious reasons. But the new research addresses another burning question: whether and how much prehistoric people altered the landscape in the Amazon before the arrival of Europeans.

"People have been affecting the global climate system through land use for not just the past 200 to 300 years, but for thousands of years," said study author John Francis Carson, a postdoctoral researcher at the University of Reading in the United Kingdom. [See Images of the Ancient Amazonian Earthworks]

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