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Sahle & Negash 2016_Figure4In order to better inform inferences drawn from the archeological record, DFG Center member Yonatan Sahle and colleague Agazi Negash of the University of Addis Ababa conduct an ethnographic experiment to assess variability in stone tool production. Their research appears in a recent issue of Lithic Technology. Image: scraper tools made from obsidian by Hadiya hideworkers in Ethiopia (copyright Taylor & Francis 2016).