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Chimps use ‘hi’ and ‘bye’ greetings, just like humans – Livescience.com

But bonobos are more “polite” than chimps.

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Eastern chimpanzees (Pan troglodytes schweinfurthii) groom each other. (Image credit: Anup Shah via Getty Images)
Chimps and bonobos signal “hello” and “goodbye” to one another when entering and exiting social encounters, a new study finds.
In other words,…

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