Ancient Stone Tools Once Thought to be Made by Humans Were Actually Crafted by Monkeys, Say Archaeologists | Artnet News
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Brazil's 50,000-year-old stone tools discovered in excavations at Pedra Furada are probably the work of capuchin monkeys, not early humans.

If monkeys made the tools, it’s a major blow to experts seeking to disprove the long-held “Clovis First” theory.