From problem-solving to emotional intelligence, these five animals exhibit brainpower that rivals humans.

Chimpanzees may well share with us cognitive abilities that were thought to be reserved for humans. A recent study reveals that these primates are capable of modifying their convictions when faced ...

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 ...