Wild Dolphins Observed Bringing Gifts to Humans

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6. Maybe they're interested in networking -- like the bonobos

http://www.sciencedaily.com/releases/2013/01/130102173312.htm

You're standing in line somewhere and you decide to open a pack of gum. Do you share a piece with the coworker standing to one side of you, or with the stranger on the other?

Most humans would choose the person they know first, if they shared at all.

But bonobos, those notoriously frisky, ardently social great apes of the Congo, prefer to share with a stranger before sharing with an animal they know. In fact, a bonobo will invite a stranger to share a snack while leaving an acquaintance watching helplessly from behind a barrier.

"It seems kind of crazy to us, but bonobos prefer to share with strangers," said Brian Hare, a professor of evolutionary anthropology at Duke University. "They're trying to extend their social network." And they apparently value that more than maintaining the friendships they already have.