Macaques in Thailand produced stone flakes while cracking nuts—a finding that could change what we thought about human history.
The long-tailed macaques rely on limestone tools to crack oil palm nuts; they use hammerstones and anvils, very much like those used by humankind. As they crack hard nuts, bits of the stones break off, resulting in an assemblage of stone flakes.
“The ability to intentionally make sharp stone flakes is seen as a crucial point in the evolution of hominins, and understanding how and when this occurred is a huge question that is typically investigated through the study of past artefacts and fossils,” said Tomos Proffitt, a researcher at the Max Planck Institute for Evolutionary Anthropology and the study’s lead author, in an...
The macaques make their stone flakes unintentionally, the researchers note, while human stone flake production has generally been attributed to intentional production of stone tools. It creates a surprisingly convenient parallel to the infinite monkey theorem, which holds that if a monkey is typing randomly on a keyboard it’ll eventually bang out Shakespeare. In this case, the monkeys are accidentally recreating a pivotal moment in human evolution.
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