Humans regularly cooperate and share resources with other, unrelated humans in different social groups, often without any immediate, reciprocated benefits. The phenomenon has been considered unique to ...

For a long time, imagination was considered a human endeavor. When we’re children, we invent invisible friends and turn ...

Like humans, some bonobos cooperate with members of other social groups, even when they don’t receive immediate benefits in return. This finding, published Thursday in the journal Science, may offer ...

Can animals play pretend? It took a tea party with a bonobo to find out. In a set of experiments, a team of researchers offered a bonobo named Kanzi invisible juice and grapes, presenting the tests as ...

A lot of human society requires what’s called a “theory of mind”—the ability to infer the mental state of another person and adjust our actions based on what we expect they know and are thinking. We ...