Levallois Artifacts Found in South China Cave (image) University of Washington Share Print E-Mail Caption These artifacts found in China are among the nearly four dozen that reflect the Levallois technique of toolmaking. In a paper published Nov. 19 in Nature, researchers date these artifacts to between 80,000 and 170,000 years ago. Credit Marwick et al. Usage Restrictions None Share Print E-Mail 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.