NatGeo Wild

We travel from south to north to explore the remotest corners of the Appalachian Trail and to meet the scientists fighting to keep this wilderness wild.

Journey with JT Reynolds, Death Valley's larger-than-life superintendent, and meet the scientists who are working to protect this wild place as the mercury rises.

If hippos, elephants, buffalo and other huge animals are not being targeted by gangs of smaller predators, they're fighting amongst themselves.

The dunes and deserts of Africa are a land where only the toughest can survive - through wits, brawn and true killer talents, these are some of Africa's deadliest.

The more predators there are, the better their chances and the bigger the prey. A solo lion can't kill a giraffe, but a pride will pull it down.

The big cats' size, camouflage and hunting strategies may vary, but they're all deadly. Meet these fascinating, agile and dangerous creatures.

The dunes and deserts of Africa are a land where only the toughest can survive - through wits, brawn and true killer talents, these are some of Africa's deadliest.

From terrifyingly powerful Nile crocodiles lying in wait to fierce battles between hippo bulls, Africa's waterholes set the stage for the continent's greatest spectacles.

Southern Africa's Bushveld region is home to the icons of the African continent - it's an untamed wilderness where ancient battles for survival play out on a grand scale.

Adult lions are 400 pounds of muscle, teeth and claw - lion cubs are four pounds of blind, toothless fluff. Follow the transformation of a cub into a killer.

The crocodile is the world's largest reptilian predator, but it takes years of intensive training to learn to be lethal. Follow the transformation of a hatchling into a killer.

Built for the Kill: Grizzly Bear follows the transformation of a helpless cub into an accomplished killer, exposing real life and death struggles in dramatic second-by-second detail.

The wolf hones its hunting skills over about two years of intensive training-and the lessons are hard. Only the strongest survive to become leader of the pack.

The hyena, much maligned and misunderstood, is no slobbering scavenger. It's a calculating killer: as smart as a primate, as lethal as a lion.

An amped-up Angus sends Dr Pol airborne while pushy pigs, an energetic husky and a skydiving Santa keep the rest of the vets moving.

The winners and losers in nature's savage battles for breeding rights, territory and food can be determined by one misjudged moment.

In the animal kingdom, the name of the game is kill or be killed - these predators use their Killer Animal Tactics to terrorise and take down prey.

A huge python needs rescuing and another caller has a lucky escape from a deadly viper.

The team takes two deadly black mamba calls - as Sioux and Mbali catch three snakes in one go, Simon bails a wolf snake out of a police station.

While Animal Control shadows Dr. Pol around town, the vets treat a cat's creepy leg wound and a German Shepherd so sick she can barely walk.

The big cats' size, camouflage and hunting strategies may vary, but they're all deadly. Meet these fascinating, agile and dangerous creatures.

A new world teeming with predators is revealed as stealthy jaguars prowl, army ants swarm and tarantulas bring down rodent prey, all as 2.5 million square miles of rainforest emerge from the folds.

The more predators there are, the better their chances and the bigger the prey. A solo lion can't kill a giraffe, but a pride will pull it down.

The dunes and deserts of Africa are a land where only the toughest can survive - through wits, brawn and true killer talents, these are some of Africa's deadliest.

From terrifyingly powerful Nile crocodiles lying in wait to fierce battles between hippo bulls, Africa's waterholes set the stage for the continent's greatest spectacles.

Southern Africa's Bushveld region is home to the icons of the African continent - it's an untamed wilderness where ancient battles for survival play out on a grand scale.

If hippos, elephants, buffalo and other huge animals are not being targeted by gangs of smaller predators, they're fighting amongst themselves.

The dunes and deserts of Africa are a land where only the toughest can survive - through wits, brawn and true killer talents, these are some of Africa's deadliest.

From terrifyingly powerful Nile crocodiles lying in wait to fierce battles between hippo bulls, Africa's waterholes set the stage for the continent's greatest spectacles.

Canyonlands is the little known jewel of the American national parks, but this rugged terrain is a more than a pretty picture - it is a history book of time.

National Geographic Television joins a rare scientific odyssey to explore the Canyon's entire 277-mile length and examine its mysteries.

A family of wild dogs looks for a safe place to raise six tiny puppies, but the sanctuary they seek is filled with potential predators.

We follow the animals living in Chile from the cold waters of Tierra Del Fuego and the Antarctic Peninsula to the frozen Patagonian steppe.

Orcas on the hunt, penguins and right whales protecting their young, and foxes patrolling the beaches - Argentina's Atlantic coastline is as dynamic as it is dangerous.

A family of wild dogs looks for a safe place to raise six tiny puppies, but the sanctuary they seek is filled with potential predators.

We follow the animals living in Chile from the cold waters of Tierra Del Fuego and the Antarctic Peninsula to the frozen Patagonian steppe.

In the South, strong westerlies bring rains that create rich green Valdivian forests which carpet the neotropic ecozone.