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Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

The 5000-year-old 626-hectare archaeological site of The Sacred City of Caral-Supe is situated on a dry desert terrace overlooking the green valley of the Supe river. It dates back to the Late Archaic ...