Researchers identify a variety of chimpanzee stonetools for cracking different nut species RSocPublishing
in the Taï Forest to those from another group in Guinea, the researchers showed that there exist notable differences between the two groups in terms of their material culture.
The study shows that this particular group of chimpanzees in Guinea uses stone hammers varying in the type of stone and sizes, and very large stone anvils, sometimes greater than one meter in length. These durable stone tools are widespread across the landscape; they preserve different levels of damage related to their use and represent a lasting record of chimpanzee behaviors.
Examples of chimpanzee hammerstones from Djouroutou, Cote d’Ivoire; illustrating their textured surface, three-dimensional surface, surface depth and surface gradient. Credit: © Tomos Proffitt Previous research has shown that by using stone tools, some groups of chimpanzees develop their own archaeological record dating to at least 4,300 years ago."The ability to identify regional differences in stone tool material culture in primates opens up a range of possibilities for future primate archaeological studies," says Tomos Proffitt from the Max Planck Institute of Evolutionary Anthropology, who led the research.
It has been hypothesized that a simple technology, like nut cracking, was a precursor to more complex stone technologies during the early stages of our own evolution more than three million years ago.
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