Chimpanzee Sign Language Study Reveals Uncanny Parallels to Human Speech

When a chimpanzee wants to flirt, it nibbles on a leaf. A request to be groomed is more direct: it will show exactly where it wants a pinch. Scientists have identified 66 gestures that chimps use to communicate, theorizing that they resemble human language. Now, a new study shows these gestures actually follow human linguistic rules, revealing how our own language evolved.

In a paper released Wednesday in the journal Proceedings of the Royal Society B, international scientists report that...

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