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Royal Society Open Science: tools for cracking nuts found in chimpanzees

Scientists have discovered many stone tools that chimpanzees use to crack nuts. Research results published in the journal Royal Society Open Science.

The researchers compared 3D models of various tools used by chimpanzees in a forest in Tai National Park with 3D models of tools from another group in Guineaand showed that there were notable differences between the two groups in terms of tool use.

Chimpanzees in Guinea use stone hammers of various types and sizes, as well as very large stone anvils, sometimes more than one meter in length. These durable tools, which are widely found in chimpanzee habitats, have damage that can be used to determine the duration of their use.

While several groups of chimpanzees practice nut cracking, the tools they use can vary considerably. These differences are due to the types of nuts used and their availability.

According to the authors of the study, the simple technology of cracking nuts was the forerunner of more complex stone technologies in the early stages of human evolution more than three million years ago.

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