The comedian George Carlin used to characterise “military intelligence” as an oxymoron. One wonders what he would have made of monkey intelligence. A study published in the journal npj Complexity has found that spider monkeys in Mexico’s Yucatán peninsula run an elaborate intelligence-gathering operation. Agents are dispersed in cells, scout different areas, split and recombine seamlessly into different cells and brief each other, pooling and synthesising their knowledge to........

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