Science: Turning the Clock Back

Historians have long accepted the notion that the Bronze Age began between 3500 and 3000 B.C. in the valley between the Tigris and Euphrates rivers in Mesopotamia. It was during this period that man is believed to have developed advanced writing techniques, built the first true cities and brought metallurgy to the stage necessary to produce bronze. Now there is evidence to suggest that a cultural flowering may have occurred earlier—and thousands of miles farther east. Archaeologists excavating sites at Ban Chiang, a small farming village in northeastern Thailand, have found sophisticated bronze artifacts dating back to about 3600 B.C.

Thai...

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