Shiyu Initial Upper Palaeolithic artefacts (IMAGE) Chinese Academy of Sciences Headquarters Caption a) Levallois points (1–3); b) other tool types including denticulate on blade (1, 2), denticulate on flake (3), and end scraper (4); c) tanged tools showing the locations of notched retouching (red) and thinning of the tangs (light blue) Credit IVPP Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. 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.