A study reveals that capuchin monkeys choose tools based on marks from previous use.

A recently publicized scientific study has revealed that wild capuchin monkeys evaluate and select tools using criteria beyond basic physical properties such as stone hardness. According to the findings, these primates make intentional decisions based on visible marks left by previous use on the stones.

This behavior demonstrates a more advanced level of tool selection and cognitive processing than previously understood in wild capuchins. The research provides new empirical evidence regarding how these animals interact with their environment and utilize material resources.