Archaeological evidence indicates that chimpanzee nut-cracking traditions have persisted for more than 4,300 years.
Sources
- The pervasive role of social learning in primate lifetime development (pmc.ncbi.nlm.nih.gov)
- https://www.mpg.de/550270/pressRelease20070207 (mpg.de)
- https://www.scientificamerican.com/article/chimpanzee-nut-bashing-technology-thousands-years-old/ (scientificamerican.com)
- https://www.nationalgeographic.com/science/article/uncovering-the-chimpanzee-stone-age (nationalgeographic.com)
- https://www.sciencedirect.com/science/article/pii/S0047248424000903 (sciencedirect.com)
- https://www.cambridge.org/core/books/abs/tool-use-in-animals/from-pounding-to-knapping-how-chimpanzees-can-help-us-to-model-hominin-lithics/3C28BB730AE4B4A459F2542E87FB20B4 (cambridge.org)