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

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 ...

Measuring animal intelligence is tricky. As humans, we can only compare the smarts of other creatures with our own — an inherently biased benchmark. "Asking which species is smarter is like asking if ...