Bonobos, one of humanity’s closest relatives, can tell when a human doesn’t know something and steps in to help — a cognitive ability never before identified in nonhuman apes, a study found.

Bonobos are highly intelligent primates capable of learning patterns, adapting strategies, and responding quickly to visual cues. In controlled experiments, they can outperform humans in certain ...

Kanzi, a bonobo celebrated for his intelligence, died in March this year. A recently published study adds to his long list of cognitive abilities: he was able to track the location of people familiar ...