Intelligent, adaptable and fierce, the polar bear learned how to survive in a place that offers few comforts to any creature.

In the vast and complex kingdom of Yellowstone, two dominant predators reign supreme: the grizzly bear and the wolf.

Meet Rodney Jackson, one of the world's leading snow leopard biologists and conservationists and director of the Snow Leopard Conservancy.

Using clips from NATURE, in this lesson students will learn about the various attributes of different predators on the African grasslands.

These clips from the NATURE episode, "Moments of Impact: Hunters and Herders," can be used in the classroom to explore the various attributes of different predators on the African grasslands.

Discover the science of some amazing animal engineering hidden deep in the jungle. Watch the full episode online.

(Premieres Sundays April 4 and April 11) New technologies reveal what's behind incredible "moments of impact" - when animals come into contact with each other and the world around them.

Predators haunt the wetland waters. Wild dogs come in for the kill, but they are driven off by lions, their age-old rivals.

"The Reptiles: Alligators and Crocodiles" looks at the ultimate predators at the margins of the water and the land.

NATURE's six-part series TRIUMPH OF LIFE presents the remarkable story of evolution and its survivors.