古代的狩猎-采集者群体之间会交换用鸵鸟蛋壳做成的&#2966 (IMAGE)

Proceedings of the National Academy of Sciences

古代的狩猎-采集者群体之间会交换用鸵鸟蛋壳做成的&#2966

Caption

古代的狩猎-采集者群体之间会交换用鸵鸟蛋壳做成的珠子；这些人群曾生活在非洲南部、且距离遥远、所生活的地理条件各不相同，其中包括沙漠和高山。

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Image courtesy of Brian A. Stewart, Yuchao Zhao, and the University of Michigan Museum of Anthropological Archaeology/John Klausmeyer

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