In the ruthless natural world, it takes more than brawn to survive--it also takes brains. Learn how intelligence plays a key role in the inventive adaptions of three animals and how they use their cunning to their advantage against bigger creatures. This episode of Killer Instincts takes you into the fascinating world of nature's brainiacs: dolphins, hyenas, and killer whales.

In the ruthless natural world, it takes more than brawn to survive--it also takes brains. Learn how intelligence plays a key role in the inventive adaptions of three animals and how they use their cunning to their advantage against bigger creatures. This episode of Killer Instincts takes you into the fascinating world of nature's brainiacs: dolphins, hyenas, and killer whales.