SONY BBC EARTH HD

Ben Fogle meets a couple who gave up their careers as journalists for a new life as grizzly bear guides in a remote mountain valley lodge in Canada.

The exploration of the glorious variety of life on earth and the breathtaking and phenomenal strategies animals and plants have developed to stay alive, is presented.

Using specially developed underwater tracking time-lapse techniques, life takes a journey to the uncharted corners of the ocean.

Plants have successfully managed to conquer every habitat on the planet by using ingenious and cunning strategies to survive.

Andy nets king salmon while fishing, and Jessie constructs a raft for firewood. Meanwhile, Glenn examines a basic campsite, and the Hailstones fish with poles while at camp.

People living in Alaska talk about their daily struggles and explain the different techniques they use to survive in a sub-zero-degree environment.

People living in Alaska talk about their daily struggles and explain the different techniques they use to survive in a sub-zero-degree environment.

While Andy reconstructs his fish wheel, Jessie takes the chaga and burl posts. Meanwhile, Glenn comes across a dangerous animal.

A group of athletic adventurers head deep into the Brazilian rainforest to prove themselves as Kalapalo Warriors by fighting in the Festival of Death.

The challengers travel to South Africa, where they receive 10 days to learn a Zulu tribe's ancient art of stick fighting, an event in which bloodshed and death remain ever-present.

A group of athletic adventurers goes to the Mexican mountains where they run a marathon race against Tarahumara Indians with the ultimate aim of being crowned the last man standing.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amidst constant change.

The filmmaker explores the wide open ocean, the biggest habitat on Earth and reveals how it still hides many secrets and hidden wonders.

In the baked Namib Desert, a pair of ostriches raise their family in the searing heat to protect them from predators, but time runs short as the chicks begin to hatch.