Patrick Aryee investigates the world's largest animals, revealing why these creatures evolved into giants and how crucial they are to their habitats. He begins in the Americas, finding out more about the sperm whale, coming face to face with grizzly bears and getting up close and personal with an anaconda.
Biologist Patrick Aryee is on a mission to find each continent's biggest beasts - on land, in the sea, and even in the trees.