A chimpanzee carries a stick to use as a tool to eat army ants. The chimpanzees insert these tools into the ant nests until the insects climb on the tool and then eat them. / Chimpanzees are the ...

The more we try to understand chimpanzees, one of our closest relatives, the more we find ourselves humbled by the richness and complexity of their lives — and of their intelligence. Today, on World ...

A female chimpanzee brings her face close to the entrance of an army ant nest hidden under fallen leaves to detect if there are ants inside. Chimpanzees use different types of memory to find insects ...