Tag: Reciprocity

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January 24, 2013

How and Why Do We Pick Our Friends?

Studies of dolphins, primates and humans show the reason we choose the companions we do is more complex, and perhaps less honorable, than we might think.

December 27, 2012

Monkey Brain Area Keeps Count of Kindnesses

The primates have an altruistic 'tally chart' that keeps track of social rewards and gifts.