Replicated Bamboo Knives Tested (IMAGE) Southern Methodist University Caption Archaeologist Ofer Bar-Yosef tests the performance efficiency of bamboo knives versus sharp stone flakes for cutting meat. Credit (Photo: Yiyuan Li) Usage Restrictions Please use credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.