Article Correctness Is Author's Responsibility: Monkey Experiments Offer Clues on Origin of Language

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Green and vervet monkeys live on either side of Africa and their evolutionary paths diverged 3.5 million years ago, and yet the two species share a hard-wired vocabulary when faced with danger, clever experiments have shown. Vervet monkeys in the savannah of east Africa utter three distinct cries depending on whether they spot a leopard, a snake or an eagle, their three main predators. The discovery thirty years ago of these unique warning...

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