tool

Scientists once thought that only humans and our closest relatives, chimps, were clever enough to use tools. But as our documenting of the natural world has gotten more detailed—and as we’ve become less haughty about our supposed superior intellect—we’ve found that many species are actually deft with sticks, stones,…

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Researchers studying macaques in one of Thailand’s national parks made a surprising discovery: While cracking nuts, the monkeys make stone flakes that look an awful lot like the flakes that scientists have attributed to ancient human. The finding means that some of the material held up as the earliest evidence of…