The clock starts just before sunrise - when the temperature begins to rise. It’s hard work being the world’s biggest lizard on Rinca island. Competition is so fierce he can’t afford to slow down. For the biggest male on the island, an ever- warming environment and shrinking hunting grounds threaten his survival across every hour of the day.

Some creatures stop at nothing when it comes to using other animals to get ahead. From Zombie moose, to parasites that take over the eyestalks of snails and mind-controlled rats chasing cats, naturalist Dan ONeil explores the weird world of alien invaders

When it comes to survival, sometimes taking over another animal is the only way to get a step ahead. Naturalist Dan ONeil investigates the weird and wonderful world of mutant animals, mind controlling fungus, and a fish that transforms itself into a set of testes.

Africa's Deadly Kingdom: Reefs dives in to reveal the astounding adaptations of a multitude of marine creatures to life below the waves.

In seemingly endless seas of green and shimmering gold, Africa's grasslands stretch out on an immense scale, home to some of the greatest gatherings of wildlife on earth.

The Kalahari. In this place of immense beauty, wonder and contrast all that live here are gifted with unique adaptations in order to survive.

Africa's Deadly Kingdom: Reefs dives in to reveal the astounding adaptations of a multitude of marine creatures to life below the waves.

Meet Dr. Pol, an expert in large farm animals and pets. This senior is anything but retiring as he takes an old-school, no-nonsense approach to veterinary medicine. Nat Geo WILD follows The Incredible Dr. Pol as he travels across rural Michigan to care for every family pet and head of livestock in need of his expertise and kindness.

Meet Dr. Pol, an expert in large farm animals and pets. This senior is anything but retiring as he takes an old-school, no-nonsense approach to veterinary medicine. Nat Geo WILD follows The Incredible Dr. Pol as he travels across rural Michigan to care for every family pet and head of livestock in need of his expertise and kindness.

Meet Dr. Pol, an expert in large farm animals and pets. This senior is anything but retiring as he takes an old-school, no-nonsense approach to veterinary medicine. Nat Geo WILD follows The Incredible Dr. Pol as he travels across rural Michigan to care for every family pet and head of livestock in need of his expertise and kindness.

Africa's Deadly Kingdom: Reefs dives in to reveal the astounding adaptations of a multitude of marine creatures to life below the waves.

The Komodo Dragon has captured our imaginations for over a century, yet so much about this incredible lizard remains a mystery. A creature with survival skills and physical characteristics seen in apex predators across the animal kingdom, and the ability to take down predators ten times its size. The secrets of the Komodo Dragon are revealed.

The clock starts just before sunrise - when the temperature begins to rise. It’s hard work being the world’s biggest lizard on Rinca island. Competition is so fierce he can’t afford to slow down. For the biggest male on the island, an ever- warming environment and shrinking hunting grounds threaten his survival across every hour of the day.

Some creatures stop at nothing when it comes to using other animals to get ahead. From Zombie moose, to parasites that take over the eyestalks of snails and mind-controlled rats chasing cats, naturalist Dan ONeil explores the weird world of alien invaders

When it comes to survival, sometimes taking over another animal is the only way to get a step ahead. Naturalist Dan ONeil investigates the weird and wonderful world of mutant animals, mind controlling fungus, and a fish that transforms itself into a set of testes.

Ruthless predators and powerful prey are embroiled in rivalry, betrayal and battle, in a never-ending crusade for survival, with characters so wild and ambitious and conflict so cutthroat, that no fiction can do it justice. Each episode presents the battle from one character's point of view, exposing the front lines of clan warfare – from a mother’s sacrifice to a father’s rage at his own son.

From the Andes mountains to the windswept coastline, Chile is home to a spectacular array of amazing wildlife that thrives in these extreme landscapes. Nowhere else in the world can you find some of these unique and interesting species.

Some creatures stop at nothing when it comes to using other animals to get ahead. From Zombie moose, to parasites that take over the eyestalks of snails and mind-controlled rats chasing cats, naturalist Dan ONeil explores the weird world of alien invaders

Thrilling tales of unbridled natural forces, danger and unconventional wonders in America’s wildest spaces. Go beyond the guidebooks and discover hidden spaces where nature rules.