Retouched Point (IMAGE) Max Planck Institute of Geoanthropology Caption An example of a retouched point from Prospect Farm, a key feature of Middle Stone Age toolkits Credit M. Grove 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.