Article: City life in the Americas - 4,500 years ago: New evidence has shown that the New World had complex urban societies much earlier than was thought.(USA)

Byline: Peter N. Spotts Staff writer of The Christian Science Monitor

At a time when the Stone Age gripped Europe and the Sumerians ruled Mesopotamia, a group of people half a world away built a city whose remains are about to rewrite a key chapter in the history of the New World.

Archaeologists in Peru's Supe Valley have found evidence that pushes back by a thousand years the emergence of complex urban societies in the Americas.

Researchers have been studying the site - known as Caral - on and off for years. More-systematic work began in 1996. But only recently have scientists been able to precisely date material unearthed from the site's ...

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