Tiémassas Levallois Core (IMAGE) Max Planck Institute of Geoanthropology Caption A Levallois core recovered from excavations at Tiémassas, part of a common, persistent suite of stone tool technologies employed at the site between 62-25 thousand years ago Credit K. Niang Usage Restrictions Please provide credit information with reuse 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.