Humans rely on smell, sight, taste, touch and sound; other animals have super-powered versions of these senses, and a few have extra senses we don't have at all. From a dog that seems to use smell to tell time to a dolphin that can "see" with its ears, discover how animals use their senses in ways we humans can barely imagine. But it's not just the senses that are remarkable — it's the brains that process them. NOVA goes into the minds of animals to "see" the world in an entirely new way.
Today, researchers are discovering that some creatures have mastered skills purportedly restricted to humans. Many are bird brains. Meet a cockatoo with a talent for picking locks; a wild crow on a mission to solve an eight-step puzzle; and a tame raven who can solve a puzzle box so quickly that his performance has to be captured with high-speed photography. Are these skills really evidence of high intelligence or just parlor tricks, the result of training and instinct? To find out, NOVA tests the limits of some of the planet’s brainiest animals.