After merger, chimpanzees learned new grunt for ‘apple’

Chimpanzees have special grunts for particular types of foods, and their fellow chimps know exactly what those calls mean. Now, by studying what happened after two separate groups of adult chimpanzees moved in together at the Edinburgh Zoo, researchers have made the surprising discovery that our primate cousins can change those referential grunts over time, to make them sound more like those of new peers. —> Read More Here

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