Micro-CT Scan (IMAGE) Proceedings of the National Academy of Sciences Caption This is a micro-CT scan of a section of the Zandmotor Neandertal birch tar-hafted tool. Credit Dominique Ngan-Tillard Usage Restrictions None 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.