The global search for the most intelligent animals has become one of science’s most captivating pursuits. From jungles to oceans to treetops, researchers are continually discovering surprising new ...

As a great ape, the chimpanzee possesses intelligence superior to most animals on the planet. A chimp’s genes determine about half of its intelligence, while environmental factors make up the other ...

If you’re planning a whimsical animal burglary, you’ll definitely want a raccoon anchoring your squad. In a bizarre 1908 study by ethologist H.B. David, raccoons were able to pick complex locks in ...

From tool-using chimpanzees to puzzle-solving capuchins, the primate world is packed with surprising brainpower. But how do the planet’s cleverest monkeys and apes really compare with human intelligen ...