Africa is home to the greatest collection of wildlife on Earth, with a vast tropical rainforest full of life at its heart, but animals face big challenges in this land of plenty.

Conservation advocates take risks to save wildlife by exploring remote jungles, going undercover to catch criminals and making a microlight journey to lead endangered birds to safety.

Earth's journey into the deep freeze starts with fire over 800 million years ago; Long before the age of the dinosaurs, before there was even animal life, the supercontinent Rodinia breaks up.

Alaskans need to adapt and shift their plans due to unpredictable winter weather.

Hannah Fry discovers the hidden WWII radar technology that heats up baked beans; she learns the legend of the melted candy bar in an engineer's pocket that kick-started a kitchen revolution; she demonstrates why microwaves zap food but not people.

In the planet's most densely populated continent, animals live at extremely close quarters with people, from tigers making a home in town to elephants stopping traffic for food.

Alaskans need to adapt and shift their plans due to unpredictable winter weather.

Hope scrambles to save the animals when a burglar busts down the door to the rehab, as the spring baby boom brings in a flood of injured and orphaned animals.

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

Ireland is small in size but epic in wonder; surrounded by the Atlantic ocean, Cliffs of Moher to the extraordinary Giant's Causeway, this land has been shaped and reshaped by both the power of water and violent geological forces.

Hope scrambles to save the animals when a burglar busts down the door to the rehab, as the spring baby boom brings in a flood of injured and orphaned animals.

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

Ireland is small in size but epic in wonder; surrounded by the Atlantic ocean, Cliffs of Moher to the extraordinary Giant's Causeway, this land has been shaped and reshaped by both the power of water and violent geological forces.

Hope scrambles to save the animals when a burglar busts down the door to the rehab, as the spring baby boom brings in a flood of injured and orphaned animals.

Alaskans struggle to get through the everyday grind as a long, dark winter looms ahead.

Hannah Fry visits headphone honchos Bose to find out how the teeny earbud tech works and meets the human testers with "golden ears.".

Africa is home to the greatest collection of wildlife on Earth, with a vast tropical rainforest full of life at its heart, but animals face big challenges in this land of plenty.

Conservation advocates take risks to save wildlife by exploring remote jungles, going undercover to catch criminals and making a microlight journey to lead endangered birds to safety.

Earth's journey into the deep freeze starts with fire over 800 million years ago; Long before the age of the dinosaurs, before there was even animal life, the supercontinent Rodinia breaks up.

Alaskans struggle to get through the everyday grind as a long, dark winter looms ahead.

The guys head to the turquoise waters of The Bahamas to try to catch venomous lionfish.

A new generation of survivalists are put to the test in the frozen Arctic.

It's officially the third-highest snowfall in Manitoba in the last century; commercial fishers are plagued by deep drifts and hidden pockets of slush that can stop them in their tracks; Chris finds out the hard way that traveling alone is a bad idea.

After seven months walking, Lev reaches his final country: Egypt; he has 900 miles to go to the Mediterranean but the authorities give him just 45 days to finish.

A new generation of survivalists are put to the test in the frozen Arctic.

It's officially the third-highest snowfall in Manitoba in the last century; commercial fishers are plagued by deep drifts and hidden pockets of slush that can stop them in their tracks; Chris finds out the hard way that traveling alone is a bad idea.

After seven months walking, Lev reaches his final country: Egypt; he has 900 miles to go to the Mediterranean but the authorities give him just 45 days to finish.

Alaskans struggle to get through the everyday grind as a long, dark winter looms ahead.

Hannah Fry visits headphone honchos Bose to find out how the teeny earbud tech works and meets the human testers with "golden ears.".

It's officially the third-highest snowfall in Manitoba in the last century; commercial fishers are plagued by deep drifts and hidden pockets of slush that can stop them in their tracks; Chris finds out the hard way that traveling alone is a bad idea.

Alaskans struggle to get through the everyday grind as a long, dark winter looms ahead.

Hope fights to save a family of foxes; the nursery is hit by a mysterious outbreak.

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.

From the icy peaks of age-old mountain glaciers to the fog-shrouded canopies of Canada's only rainforest, it's the wettest place in North America.

Hope fights to save a family of foxes; the nursery is hit by a mysterious outbreak.

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.

From the icy peaks of age-old mountain glaciers to the fog-shrouded canopies of Canada's only rainforest, it's the wettest place in North America.

Hope fights to save a family of foxes; the nursery is hit by a mysterious outbreak.

The looming winter forces Alaskans to tackle obstacles to ensure a prosperous winter.

Hannah goes behind the scenes to look at the technology behind the lift; along the way, she finds out how coal mines made lifts safer, gets to grips with a piece of medieval siege technology and discovers how a PR stunt changed the modern skyline.

A new generation of survivalists are put to the test in the frozen Arctic.

It's officially the third-highest snowfall in Manitoba in the last century; commercial fishers are plagued by deep drifts and hidden pockets of slush that can stop them in their tracks; Chris finds out the hard way that traveling alone is a bad idea.

After seven months walking, Lev reaches his final country: Egypt; he has 900 miles to go to the Mediterranean but the authorities give him just 45 days to finish.

The looming winter forces Alaskans to tackle obstacles to ensure a prosperous winter.

In the heart of Asia lie vast arid lands; these deserts and dry grasslands are so hostile, they push life to the limit; the animals that live here are some of the toughest on earth - they are Asia's great survivors.

Brian reveals how the atmosphere can create most of the wonderful sights in the solar system.

A look at how the planet's limited fresh water is distributed around the globe thanks to storms, and how animals manage in the driest habitats on Earth.

Professor Cox explores the cycles of time that define the lives of humans.

Brian reveals how the atmosphere can create most of the wonderful sights in the solar system.

A look at how the planet's limited fresh water is distributed around the globe thanks to storms, and how animals manage in the driest habitats on Earth.

Professor Cox explores the cycles of time that define the lives of humans.

The looming winter forces Alaskans to tackle obstacles to ensure a prosperous winter.

Hannah goes behind the scenes to look at the technology behind the lift; along the way, she finds out how coal mines made lifts safer, gets to grips with a piece of medieval siege technology and discovers how a PR stunt changed the modern skyline.

In the heart of Asia lie vast arid lands; these deserts and dry grasslands are so hostile, they push life to the limit; the animals that live here are some of the toughest on earth - they are Asia's great survivors.

The looming winter forces Alaskans to tackle obstacles to ensure a prosperous winter.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

The Cassini-Huygens spacecraft has been sending images and a wealth of scientific revelations from Saturn's orbit since 2004.

An enormous fiery vortex in Redding, Calif.; the island nation of Malta loses a natural treasure; a mysterious radioactive hotspot is discovered near Chernobyl; an unknown force lays waste to a mountain forest in Italian Alps.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Along the west coast of Great Britain, the world's longest uninterrupted footpath forges through more than 800 miles of breathtaking scenery; the diverse landscape of the Welsh coast is a geological treasure.

Dive into the historical and natural secrets of the deep; explore an uninhabited concrete island, ocean spirals off the Australian coast, underwater evidence of a violent past and tracks thousands of metres below the sea's surface.

The St. Lawrence River is one that forged North America, allowing ships to traverse the continent; the adventure begins in Canada's first capital city of Kingston and near Canada's second-largest city of Montreal.

Africa is home to the greatest collection of wildlife on Earth, with a vast tropical rainforest full of life at its heart, but animals face big challenges in this land of plenty.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

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.

In the planet's most densely populated continent, animals live at extremely close quarters with people, from tigers making a home in town to elephants stopping traffic for food.

In the heart of Asia lie vast arid lands; these deserts and dry grasslands are so hostile, they push life to the limit; the animals that live here are some of the toughest on earth - they are Asia's great survivors.

Gordon Buchanan joins the Pazhetnovs, a pioneering family of biologists, in snowy Russia to rehabilitate six orphaned grizzly cubs back to the wild.

A new generation of survivalists are put to the test in the frozen Arctic.

Isolated for millions of years, Australia has a variety of unique animals, including the most dangerous bird in the world, kangaroos, wombats, koalas and predators.

With scientists sending space probes to the furthest reaches of the solar system and beyond, the scientific search for alien life has begun; inspired by a childhood love of science fiction, Brian still hopes to hear from ET.

Steve goes on a mission to learn whether the sharks of the Indian Ocean are capable of adapting to rapidly changing conditions like climate change, overfishing, and pollution.

Isolated for millions of years, Australia has a variety of unique animals, including the most dangerous bird in the world, kangaroos, wombats, koalas and predators.

With scientists sending space probes to the furthest reaches of the solar system and beyond, the scientific search for alien life has begun; inspired by a childhood love of science fiction, Brian still hopes to hear from ET.

Steve goes on a mission to learn whether the sharks of the Indian Ocean are capable of adapting to rapidly changing conditions like climate change, overfishing, and pollution.

Isolated for millions of years, Australia has a variety of unique animals, including the most dangerous bird in the world, kangaroos, wombats, koalas and predators.

Brian reveals how the atmosphere can create most of the wonderful sights in the solar system.

A look at how the planet's limited fresh water is distributed around the globe thanks to storms, and how animals manage in the driest habitats on Earth.

Professor Cox explores the cycles of time that define the lives of humans.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Scientists explore how to protect the earth when solar storms destroy earthbound technologies and send satellites crashing to earth.

A long-forgotten network of Native American earthworks; a baffling battlefield mystery in Belgium; a mysterious blood red lake on a remote Greek island; an eerie pink glow emulating form the middle of the Pacific Ocean.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Ireland is small in size but epic in wonder; surrounded by the Atlantic ocean, Cliffs of Moher to the extraordinary Giant's Causeway, this land has been shaped and reshaped by both the power of water and violent geological forces.

Traipsing along ancient pathways criss-crossing Easter Island; finding gigantic designs carved into Asia's Eastern Steppe; ascending a tall pyramid rising from Antarctica's icy landscape.

Navigating the historic Potomac River from West Virginia to Chesapeake Bay, passing through Washington, D.C. and the national monuments and ending at George Washington's Mount Vernon estate.

Brian reveals how the atmosphere can create most of the wonderful sights in the solar system.

A look at how the planet's limited fresh water is distributed around the globe thanks to storms, and how animals manage in the driest habitats on Earth.

After seven months walking, Lev reaches his final country: Egypt; he has 900 miles to go to the Mediterranean but the authorities give him just 45 days to finish.

Levison and Alberto begin their journey on the northern shores of Mexico's Yucatan Peninsula.

The guys head to the turquoise waters of The Bahamas to try to catch venomous lionfish.

Steve Backshall is in Brazil searching for the world's most elusive cat, the jaguar; he sees them swimming, meets mothers and cubs, and even witnesses one jaguar hunting a caiman.

Setting sail to the island of Bali, Steve and the team are out to find the elusive ocean sunfish; these deep ocean giants feed on poisonous jellyfish and ascend to the shallows for a spa session at a cleaner fish station.

Africa is home to the greatest collection of wildlife on Earth, with a vast tropical rainforest full of life at its heart, but animals face big challenges in this land of plenty.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Conservation advocates take risks to save wildlife by exploring remote jungles, going undercover to catch criminals and making a microlight journey to lead endangered birds to safety.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Conservation advocates take risks to save wildlife by exploring remote jungles, going undercover to catch criminals and making a microlight journey to lead endangered birds to safety.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Alaskans need to adapt and shift their plans due to unpredictable winter weather.

Alaskans struggle to get through the everyday grind as a long, dark winter looms ahead.

The looming winter forces Alaskans to tackle obstacles to ensure a prosperous winter.

Twin fawns arrive at the centre; a volunteer searches for orphans in the woods; Hope tends to a tiny owl.

The jungle, underwater caves and lush everglades of the Yucatan shelter Mexico's largest predator, Morelet's crocodile.

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.

Twin fawns arrive at the centre; a volunteer searches for orphans in the woods; Hope tends to a tiny owl.

The jungle, underwater caves and lush everglades of the Yucatan shelter Mexico's largest predator, Morelet's crocodile.

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.

On the intimidating shores of the Atlantic Ocean, six Indigenous strangers must come together in order to survive without food or modern technology; after a difficult canoe paddle, they work to set up camp before nightfall.

Alaskans must travel far and wide to obtain resources vital for survival in the dead of winter.

Professor Brian Cox traces the development of the four rocky worlds closest to the sun: Mercury, Venus, Earth and Mars; born together, they battled the unbelievable violence of the early solar system to become stable planets.

On the intimidating shores of the Atlantic Ocean, six Indigenous strangers must come together in order to survive without food or modern technology; after a difficult canoe paddle, they work to set up camp before nightfall.

Asia has the longest coastline of any continent, rich coral reefs, and never-seen-before animal behavior; exploring Asia's diverse waters.

Alaskans must travel far and wide to obtain resources vital for survival in the dead of winter.

Africa is home to the greatest collection of wildlife on Earth, with a vast tropical rainforest full of life at its heart, but animals face big challenges in this land of plenty.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Levison and Alberto travel through Guatemala, Honduras and Nicaragua.

Levison and Alberto visit the landscapes, colonial cities, active volcanoes and mountains of Nicaragua and Costa Rica.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

Levison and Alberto travel through Guatemala, Honduras and Nicaragua.

Levison and Alberto visit the landscapes, colonial cities, active volcanoes and mountains of Nicaragua and Costa Rica.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

Alaskans must travel far and wide to obtain resources vital for survival in the dead of winter.

Professor Brian Cox traces the development of the four rocky worlds closest to the sun: Mercury, Venus, Earth and Mars; born together, they battled the unbelievable violence of the early solar system to become stable planets.

The jungle, underwater caves and lush everglades of the Yucatan shelter Mexico's largest predator, Morelet's crocodile.

Alaskans must travel far and wide to obtain resources vital for survival in the dead of winter.

Lynn plays surrogate to baby beavers; Zach is forced to follow a seal along the coastline; a patient returns after a release goes wrong.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

Lynn plays surrogate to baby beavers; Zach is forced to follow a seal along the coastline; a patient returns after a release goes wrong.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Decoding the secrets of long-lost human settlements; scrutinizing a mysterious Norwegian mound, a prehistoric stone circle on the banks of the Tagus River, a lost city in the cradle of civilization and bizarre rock shapes.

Needing to repair canoes, and find food, the adventurers are grateful to learn fire-making even as tensions rise; a snake in the grass might be their best chance at a meal.

Alaskans trap and hunt for essential food and fur to survive the dark winter.

Brian learns that the solar system was once home to two blue planets.

Needing to repair canoes, and find food, the adventurers are grateful to learn fire-making even as tensions rise; a snake in the grass might be their best chance at a meal.

Asia is the most mountainous continent on earth; from the tropical south to its barren centre, its highest places are home to some of our planet's most remarkable wildlife.

Alaskans trap and hunt for essential food and fur to survive the dark winter.

Levison and Alberto travel through Guatemala, Honduras and Nicaragua.

Levison and Alberto visit the landscapes, colonial cities, active volcanoes and mountains of Nicaragua and Costa Rica.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

Steve Backshall is in Australia, searching for the world's most freaky and venomous fish: the stonefish; he also finds trapdoor spiders and a snake that hunts bats.

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

The trio heads to South Africa where they encounter the great white shark.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Steve Backshall is in Australia, searching for the world's most freaky and venomous fish: the stonefish; he also finds trapdoor spiders and a snake that hunts bats.

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

The trio heads to South Africa where they encounter the great white shark.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

Alaskans trap and hunt for essential food and fur to survive the dark winter.

Brian learns that the solar system was once home to two blue planets.

In the heart of central Mexico, lies Sierra Gorda, a region that is home to bobcats, pumas and flying squirrels.

Alaskans trap and hunt for essential food and fur to survive the dark winter.

Jennie and Stephanie try to save a harbour seal pup.

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

Jennie and Stephanie try to save a harbour seal pup.

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

Tempers flare after the group tries hunting for food, when the journey and personalities prove more challenging than anyone expected; in the aftermath of a fight, Theresa and Joshua question if they have what it takes to continue.

In anticipation of the coming spring, Alaskans pursue scarce resources.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Tempers flare after the group tries hunting for food, when the journey and personalities prove more challenging than anyone expected; in the aftermath of a fight, Theresa and Joshua question if they have what it takes to continue.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

In anticipation of the coming spring, Alaskans pursue scarce resources.

Steve Backshall is in Australia, searching for the world's most freaky and venomous fish: the stonefish; he also finds trapdoor spiders and a snake that hunts bats.

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

The trio heads to South Africa where they encounter the great white shark.

Levison and Alberto visit the landscapes, colonial cities, active volcanoes and mountains of Nicaragua and Costa Rica.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

In anticipation of the coming spring, Alaskans pursue scarce resources.

Brian learns about the oldest planet in the solar system Jupiter, which uses its size to manipulate other planets.

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

In anticipation of the coming spring, Alaskans pursue scarce resources.

When a fawn is found stuck in thick, toxic tar, Hope assembles her entire team to wash and care for it in a desperate bid to save its life.

Iceland is the world's largest volcanic island and new ground is born daily.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

When a fawn is found stuck in thick, toxic tar, Hope assembles her entire team to wash and care for it in a desperate bid to save its life.

Iceland is the world's largest volcanic island and new ground is born daily.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

Daybi struggles to make amends as the group tackles a grueling paddle on the open ocean; they once again leave little time to erect a shelter finished before nightfall.

As winter winds down, Alaskans encounter roadblocks in their struggle for survival.

Brian learns how Saturn began its life as a strange planet of rock and ice, born outside the snow line, with an abundance of building materials.

Daybi struggles to make amends as the group tackles a grueling paddle on the open ocean; they once again leave little time to erect a shelter finished before nightfall.

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.

As winter winds down, Alaskans encounter roadblocks in their struggle for survival.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

At the onset of winter, Alaskans combat threats; a storm batters Kavik as Sue fortifies camp; Ricko searches for elusive wildlife; the Hailstones ice fish; Johnny secures food in the Brooks Range.

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.

Gordon Buchanan begins training the cubs for their new life in the wilderness; with just ten weeks left before release, little Pasha is still struggling.

At the onset of winter, Alaskans combat threats; a storm batters Kavik as Sue fortifies camp; Ricko searches for elusive wildlife; the Hailstones ice fish; Johnny secures food in the Brooks Range.

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.

The trio heads to South Africa where they encounter the great white shark.

As winter winds down, Alaskans encounter roadblocks in their struggle for survival.

Brian learns how Saturn began its life as a strange planet of rock and ice, born outside the snow line, with an abundance of building materials.

Iceland is the world's largest volcanic island and new ground is born daily.

As winter winds down, Alaskans encounter roadblocks in their struggle for survival.

Hope realizes she's not prepared to rescue animals from an oil spill, so she heads across the continent to learn from the best before disaster strikes.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

Hope realizes she's not prepared to rescue animals from an oil spill, so she heads across the continent to learn from the best before disaster strikes.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

Everyone is left shocked after an adventurer calls it quits and leaves the journey for good; the remaining five are torn apart, as some look to potentially branch off on their own.

As winter comes to a close, there are no shortcuts for Alaskans as they wrap up the season.

Professor Brian Cox journeys to the remotest part of the solar system where the mysteries of Saturn, Uranus and Neptune remain in the shadows.

Everyone is left shocked after an adventurer calls it quits and leaves the journey for good; the remaining five are torn apart, as some look to potentially branch off on their own.

In the planet's most densely populated continent, animals live at extremely close quarters with people, from tigers making a home in town to elephants stopping traffic for food.

As winter comes to a close, there are no shortcuts for Alaskans as they wrap up the season.

At the onset of winter, Alaskans combat threats; a storm batters Kavik as Sue fortifies camp; Ricko searches for elusive wildlife; the Hailstones ice fish; Johnny secures food in the Brooks Range.

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.

Levison and Alberto travel through Guatemala, Honduras and Nicaragua.

Brian examines the universal laws of nature; planet size can make a difference between life and death.

There are not five separate oceans, but one; its waters linked by powerful forces that keep them on the move.

The same 92 elements that exist on Earth can be found throughout the cosmos.

Brian examines the universal laws of nature; planet size can make a difference between life and death.

There are not five separate oceans, but one; its waters linked by powerful forces that keep them on the move.

The same 92 elements that exist on Earth can be found throughout the cosmos.

As winter comes to a close, there are no shortcuts for Alaskans as they wrap up the season.

Professor Brian Cox journeys to the remotest part of the solar system where the mysteries of Saturn, Uranus and Neptune remain in the shadows.

Iceland's volcanoes generate one third of earth's land-based lava, but the land was sculpted by ice.

As winter comes to a close, there are no shortcuts for Alaskans as they wrap up the season.

Twin fawns arrive at the centre; a volunteer searches for orphans in the woods; Hope tends to a tiny owl.

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.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

Costa Rica is a world of its own; a tropical corridor squeezed between two great oceans, powered by rivers and volcanoes; its volcanoes erupt and deposit minerals into the soil, making the land fertile and creating the country's rich bio-diversity.

Zoom in on some otherworldly sights; spot a giant glacier on the Red Planet, let the milky seas off the coast of Java bathe your vision, ponder a huge hexagon floating above Saturn and take a spin around a doughnut-shaped lake in Saskatchewan.

A journey down one of the wild rivers in the world, the Yukon; the unusual trip starts in an aircraft piloted by a painter and the odyssey ends with a visit to a graveyard of disintegrating rear-wheel steamers.

When a fawn is found stuck in thick, toxic tar, Hope assembles her entire team to wash and care for it in a desperate bid to save its life.

In the remote reaches of Asia's frozen north, creatures must overcome unique challenges, finding exceptional ways to thrive in a hostile world that pushes life to its very limits.

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.

In the planet's most densely populated continent, animals live at extremely close quarters with people, from tigers making a home in town to elephants stopping traffic for food.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.