Describes the leopards of Tanzania and their interaction with the other animals there.

The Emmy-winning series is the definitive natural history of the world's oceans exploring everything from the popular shores and teeming shallows to the mysterious ocean depths. It's a journey that gets stranger and more awe-inspiring as it goes along. Over three hours of bonus content.

Four years in the making, and filmed over 3000 days across every continent and in every habitat, see 130 incredible stories from frontiers of the natural world. Discover the glorious variety of life on Earth and the spectacular and extraordinary tactics animals and plants have developed to stay alive. This is evolution in action: individual creatures under extreme pressure to overcome challenges from adversaries and their environment.

An up-close and personal look at one of Antarctica's lesser-known inhabitants: the human. Join Werner Herzog as he shows those amazing individuals who work, play, and struggle to live in some of the world's worst conditions.

How did our ancestors come to invent language, to shape the world with tools, to create art, and to imagine the future? Follow your family tree all the way back to the first primate ancestors to stand on two legs. See how the first sparks of reason in early humans helped them to adapt in an ever-changing world.

Explore the science, myths and mystery of this fearsome predator in 14 favorite Discovery Channel programs from Shark Week-- the series that has been exciting fans for 20 years.

Explores hauntings through witness accounts, pictures, on-location shots, and re-enactments.

Filmmaker Jim Dutcher and his wife Jamie lived with gray wolves for three years to make this documentary, and their work reveals complex social behavior never before captured on film. You'll observe the dominance of the pack's alpha male and the submissiveness of the omega wolf. You'll see the pack initiate new members, and witness the critical moment when the alpha selects a mate. Perhaps most incredible is the bond developed between the wolves and...

When dinosaurs roamed America: "State-of-the art computer animation, live-action backgrounds and the latest scientific finds show how dinosaurs lived and died in our backyards. Go inside dinosaurs to see the latest known about their anatomy and physiology." Valley of the T-Rex: "In the arid badlands of Montana, paleontologist Jack Horner found five T-Rex dinosaurs in a single summer, exposing clues to a lost world. Unearthed is a 90 percent complete,...

"Each season, as the ever-thinning Arctic ice recedes, polar bears face a daunting challenge; Grizzly bears in British Columbia must use ingenuity and fancy footwork to collect their catch; The annual rains of the Serengeti draw in the greatest concentration of large animals on Earth; Each year, billions of sardines flood South Africa's east coast creating an action-packed feeding frenzy; Thousands of animals make the long trek toward the life saving...