Stone throwing chimps appear to like the sound when it hits a tree

A team of researchers from the Max Planck Institute of Evolutionary Anthropology and Aix-Marseille University has found evidence that suggests a group of chimpanzees who throw stones at trees appear to do so for the acoustical effect. In their paper published in the journal Biology Letters, the group describes experiments they carried out with stone throwing and trees and what they learned from them.

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