Is laughter a specifically human trait? When did the monsters begin to laugh? And BTW your feed is revelatory.
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Chimps have a prequel which they don't use for social grooming. The "monster" started the real thing at Homo ergaster/erectus era.
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thank you! Dunbar's work is very interesting.
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I love Dunbar. His recent little book "Human Evolution" is brilliant.
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Thank you. This article was very interesting indeed
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