New methods to identify wooden tools with major implications for the origins of tool use


• Chimpanzee percussive foraging leaves permanent damage on wooden tools

• Percussive activities leave diagnostic patterns visible in 2D images and 3D surfaces

• Machine learning can diagnose damage patterns even when details are obscured

• Percussive activities produce irreversible damage to the internal structure of wood


Luncz L.V., Braun D.R., Marreiros J., Bamford M., Zheng C., Soiret S.P., Junghenn P., Buckley Z., Yao X., Carvalho S. 2022. Chimpanzee wooden tool analysis advances the identification of percussive technology. iScience 25(11).