Intelligence isn’t unique to humans — as the 15 videos of animals solving problems below are about to show you. The animal kingdom is packed with creatures that can solve complex puzzles, use tools, ...

At the turn of the 20th century, a famous horse named Clever Hans toured Germany. The horse stunned crowds as his trainer demonstrated the animal's alleged ability to understand German, tell time and ...

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