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http://www.sciencenews.org/view/access/id/56806
Marks of distinction
Ostrich eggshell fragments found at a rock shelter in southern Africa indicate that people living there roughly 60,000 years ago used these eggshells as water containers. In an early example of symbolic communication, the people engraved standardized geometric designs on the shells that probably indicated group identity.
Credit: P.-J. Texier, Diepkloof project


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