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How did humans start talking?

Scientists disagree over how human language arose. Some think that our human ancestors started talking as soon as their brains became large and sophisticated enough. Others think that language evolved slowly, from the gestures and sounds used by our earlier ape-like ancestors. To test whether present-day apes have the ability to communicate using language, researchers have tried teaching them different kinds of language.

Researchers have tried teaching apes different kinds of language.
Researchers have tried teaching apes different kinds of language.
Linda Koebner & Joey Morgan, Chimps Haven Inc.

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