BBC Earth

The Hailstones hide emergency supplies along their hunting and trapping routes; Sue's connection with the outside world hangs in the balance; Erik falls while gathering firewood.

Chip and Agnes head to Kiwalik River for hunting and fishing; Sue fabricates snowshoes to scout the tundra; Andy fights through frigid temperatures to replenish his resources; Erik and Martha set fur traps.

Andy makes snares; Erik and Martha cut into their last moose quarter; Chip and Agnus hunt caribou; Sue clears the plane runway for her snow machine delivery.

The first mammal of the year is born.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

How the earth's atmosphere came to be; the one man to have braved the atmosphere's upper reaches and survived.

The first mammal of the year is born.

Exploring some of the most cavernous places on the planet, including an expansive Siberian crater with no explainable origin, Greenland's bizarre black holes, an ancient forbidden well in the Yemeni desert, and a voluminous void in Antarctica.

The search for the building blocks of life on Mars; an attempt to prove life was, or is, possible on the red planet.

The first mammal of the year is born.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

Satellites follow an elephant family struggling through drought; reveals previously unknown emperor penguin colonies from the color of their poo; discovers mysterious ice rings that could put seal pups in danger.

Asia's jungles are beautiful and exceptionally diverse, but whilst they provide shelter, food, and opportunity, they are also full of dangers and hidden threats.

Tells an intimate and enchanting story of an emperor penguin chick's first precarious months on the ice, growing up in the world's most extreme nursery.

Steve Backshall and his team travel to Kyrgyzstan in search of snow leopards, one of the world's most endangered species.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

Going back to the far North of the planet where the largest landhabitat on Earth exists, home to great Boreal forests and the barren tundra.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

Satellites follow an elephant family struggling through drought; reveals previously unknown emperor penguin colonies from the color of their poo; discovers mysterious ice rings that could put seal pups in danger.

Going back to the far North of the planet where the largest landhabitat on Earth exists, home to great Boreal forests and the barren tundra.

As winter begins to fade and signs of spring appear, Alaskans must start to store supplies for the upcoming months.

Hope struggles to save a seal for the first time.

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

The search for the building blocks of life on Mars; an attempt to prove life was, or is, possible on the red planet.

Hope struggles to save a seal for the first time.

A perfect circle carved around an ancient peak; a scary phenomenon in the Pacific; strange shapes in a Middle Eastern desert; a formation below the ocean's surface.

The search for the building blocks of life on Mars; an attempt to prove life was, or is, possible on the red planet.

Hope struggles to save a seal for the first time.

Spring is on the horizon, and the Alaskans prepare for the coming months as winter ends; Sue Aikens' snow machine crash leaves her with an uncertain future; Sue heads into town to get a diagnosis on her injury.

The Australian outback is covered in pale spots, the work of wombats; a clearing in the green canopy of the Congo rainforest has been created by an elephant gathering; the twists and turns of the Amazon make a home for rehabilitated manatees.

Leaders and representatives of Aboriginal communities show Zac and Darin how indigenous cultures live to protect and preserve the land.

Levison takes in the scenery in northern Pakistan's mountain valleys.

Levison reunites with his old friend Binod Parya who once saved his life.

Spring is on the horizon, and the Alaskans prepare for the coming months as winter ends; Sue Aikens' snow machine crash leaves her with an uncertain future; Sue heads into town to get a diagnosis on her injury.

Coming face to face with the scientists bearing witness to history's profound climate shift; pondering the effect these changes have on Earth's human and animal communities, mapping the destruction from space and learning how to save the planet.

A race to find the planet's 60 deadliest creatures.

Steve heads to Zambia for the first time, where he hears hippo communication on a whole new level, spots a high-diving crocodile and meets some sniffer dogs who help prevent elephant poaching.

A young Albertosaurus, a relative of Tyrannosaurus rex, must earn her place in a deadly hunting pack or face starvation.

Tells an intimate and enchanting story of an emperor penguin chick's first precarious months on the ice, growing up in the world's most extreme nursery.

A race to find the planet's 60 deadliest creatures.

Steve heads to Zambia for the first time, where he hears hippo communication on a whole new level, spots a high-diving crocodile and meets some sniffer dogs who help prevent elephant poaching.

A young Albertosaurus, a relative of Tyrannosaurus rex, must earn her place in a deadly hunting pack or face starvation.