Figure 1 (IMAGE) Nagoya University Caption The increase in the productivity of stone tool cutting-edge (shown in white lines) did not occur before or at the beginning of Homo sapiens’ wide dispersals in Eurasia but subsequently occurred after their initial dispersals, coinciding with the development of bladelet technology in the Early Upper Paleolithic. Credit Reiko Matsushita Usage Restrictions Credit must be given where image is used License Original 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.