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

Jane Goodall’s research at Gombe Stream National Park revolutionized our understanding of chimpanzee intelligence. In 1960, she observed a chimp named David Greybeard stripping leaves from twigs to ...

Intelligence isn't unique to humans — as the 15 amazing videos of animals solving problems in this article are about to show you.

When Aristotle claimed that humans differ from other animals because they have the ability to be rational, he understood rational to mean that we could form our views and beliefs based on evidence, ...