The winter season grows more erratic, and Alaskans are forced to adapt.

The extraordinary story of how the human species, Homo sapiens, first emerged, where the discoveries of recent years are revolutionising the understanding of humanity's origin story.

The boys are in Laos in search of a diabolical catfish, but the best place to find it is near the mouth of Mekong, where it is believed that there is a hidden world. It is a difficult journey and the road is full of evil spirits.

Alaskans rediscover old practices to get through the heart of winter.

The Earth's surface is changing faster than ever in human history: cities grow, forests disappear and glaciers melt; a man feeds thousands of parakeets in a city; in Sumatra, a female orangutan and her daughter face life in a forest under threat.

A colony of emperor penguins arrive in Atka Bay, after three months at sea, to raise their chicks through the coming winter.

Alaskans rediscover old practices to get through the heart of winter.

Hope puts everything on the line to save an orphaned black bear cub; two bobcats are ready for release, but they won't go easy.

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

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

Hope puts everything on the line to save an orphaned black bear cub; two bobcats are ready for release, but they won't go easy.

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

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

Hope puts everything on the line to save an orphaned black bear cub; two bobcats are ready for release, but they won't go easy.

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

A danger zone in space above the South Atlantic where lights flash and satellites go haywire; astronauts' first-hand accounts.

The leader of a once mighty lion pride must now battle for their very survival; a look at whether or not this extraordinary lioness can save her family from disaster.

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

Exploring fossils from a North Dakota site that may reveal what happened when an asteroid struck Earth and wiped out the dinosaurs.

In northern Queensland, nature nerd Dr Ann Jones comes face to face with one of Australia's mightiest predators, the bull shark, and discovers there's much more to them than meets the eye.

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

The extraordinary story of how the human species, Homo sapiens, first emerged, where the discoveries of recent years are revolutionising the understanding of humanity's origin story.

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.

Humans are changing our planet so rapidly, it's affecting earth's life support systems: our weather, our oceans and the living world.

A look at how gravity affects the world, and even the solar system.

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.

Humans are changing our planet so rapidly, it's affecting earth's life support systems: our weather, our oceans and the living world.

In northern Queensland, nature nerd Dr Ann Jones comes face to face with one of Australia's mightiest predators, the bull shark, and discovers there's much more to them than meets the eye.

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

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

A danger zone in space above the South Atlantic where lights flash and satellites go haywire; astronauts' first-hand accounts.

The leader of a once mighty lion pride must now battle for their very survival; a look at whether or not this extraordinary lioness can save her family from disaster.

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

A cow winds up at Hope For Wildlife; the spring orphans are all grown up, and Hope has to decide who's ready for release.

Examine strange relics forgotten by time; visit a perturbing circle of stone in the Golan Heights; a mountain of headless statues in Turkey; a castle left to crumble in the Saudi Arabian desert; a time-worn secret in the wilds of Peru.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

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.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

A journey on Scotland's River Spey, traveling from its source in the Highlands, winding by boat through the mountains to where the river meets the North Sea.

The rehab is flooded with orphaned seals, with some frozen solid in ice.

A group of chimps in Senegal is led by an alpha male named Dave.

A colony of emperor penguins arrive in Atka Bay, after three months at sea, to raise their chicks through the coming winter.

Many passionate people are dedicated to saving the wild animals of Asia; these individuals and their ingenious solutions give hope and optimism for the future of the continent.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

Sir David Attenborough reveals new animal behaviors in the ocean.

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.

The boys are in Laos in search of a diabolical catfish, but the best place to find it is near the mouth of Mekong, where it is believed that there is a hidden world. It is a difficult journey and the road is full of evil spirits.

From the bone-dry deserts of the Atacama, where penguins weave their way through a minefield of snapping sea lions, to the lush cloud forests of the Andes, South America is full of unusual and ingenious wildlife.

Brian explores one of the greatest mysteries in physics: time.

Steve Backshall travels from the icy waters of Alaska to the tropics to study the life of sharks.

From the bone-dry deserts of the Atacama, where penguins weave their way through a minefield of snapping sea lions, to the lush cloud forests of the Andes, South America is full of unusual and ingenious wildlife.

Brian explores one of the greatest mysteries in physics: time.

Steve Backshall travels from the icy waters of Alaska to the tropics to study the life of sharks.

Brian explores one of the greatest mysteries in physics: time.

Steve Backshall travels from the icy waters of Alaska to the tropics to study the life of sharks.

A look at how gravity affects the world, and even the solar system.

Hope opens her doors to the public.

Confront objects that make no sense; spot a spinning island in an Argentinian marsh, a colossal triangle stuck in the Arizona desert, mysterious multicoloured pools across northern Ethiopia and a huge human figure hidden in the Australian outback.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

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.

Psychedelic swirls in the Utah wastelands; a bizarre configuration of circles in the Sahara; hidden lines with the help of a drone; a remote polka-dot lake in Canada.

A journey along Ireland's longest river, the Shannon, through an emerald green landscape of rolling hills and sparkling waters; how Vikings, monks and kings have all made their mark.

Hope puts everything on the line to save an orphaned black bear cub; two bobcats are ready for release, but they won't go easy.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

Sir David Attenborough reveals new animal behaviors in the ocean.

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.

In northern Queensland, nature nerd Dr Ann Jones comes face to face with one of Australia's mightiest predators, the bull shark, and discovers there's much more to them than meets the eye.

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

Levison and Alberto explore a vampire bat-infested cave, the Panama Canal and modern Panama City.

Levison begins his journey in Afghanistan's remote and inhospitable Wakhan Corridor.

A Spinosaurus, the world's largest ever predatory dinosaur, struggles to bring up his babies and lead his young family across one of the deadliest environments on Earth.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

Four rival families, leopards, hyena, wild dogs and lions, all try to claim a rich corner of Zambian paradise as their home.

A Spinosaurus, the world's largest ever predatory dinosaur, struggles to bring up his babies and lead his young family across one of the deadliest environments on Earth.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

Four rival families, leopards, hyena, wild dogs and lions, all try to claim a rich corner of Zambian paradise as their home.

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.

Many passionate people are dedicated to saving the wild animals of Asia; these individuals and their ingenious solutions give hope and optimism for the future of the continent.

A group of chimps in Senegal is led by an alpha male named Dave.

A colony of emperor penguins arrive in Atka Bay, after three months at sea, to raise their chicks through the coming winter.

The leader of a once mighty lion pride must now battle for their very survival; a look at whether or not this extraordinary lioness can save her family from disaster.

When a great horned owl arrives covered in oil, Doctor Sherri must put it through a terrifying, life-saving procedure; boxes of young foxes need help and attention.

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

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

When a great horned owl arrives covered in oil, Doctor Sherri must put it through a terrifying, life-saving procedure; boxes of young foxes need help and attention.

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

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

When a great horned owl arrives covered in oil, Doctor Sherri must put it through a terrifying, life-saving procedure; boxes of young foxes need help and attention.

Alaskans test their will and luck against Dark Winter's obstacles.

Two brilliant physicists, Albert Einstein and Stephen Hawking have each defined humanity's understanding of the universe but their beliefs on how it works do not always align.

The leader of a great Painted Wolf family is growing old and her power to keep the peace is waning; a feud with an ambitious daughter threatens to bring the dynasty down.

Alaskans test their will and luck against Dark Winter's obstacles.

Four rival families, leopards, hyena, wild dogs and lions, all try to claim a rich corner of Zambian paradise as their home.

In northern Queensland, nature nerd Dr Ann Jones comes face to face with one of Australia's mightiest predators, the bull shark, and discovers there's much more to them than meets the eye.

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

The extraordinary story of how the human species, Homo sapiens, first emerged, where the discoveries of recent years are revolutionising the understanding of humanity's origin story.

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

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

Persued by a group of Utahraptors, a gang of armored dinosaurs battle to reach adulthood.

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

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

Persued by a group of Utahraptors, a gang of armored dinosaurs battle to reach adulthood.

Alaskans test their will and luck against Dark Winter's obstacles.

Two brilliant physicists, Albert Einstein and Stephen Hawking have each defined humanity's understanding of the universe but their beliefs on how it works do not always align.

The leader of a great Painted Wolf family is growing old and her power to keep the peace is waning; a feud with an ambitious daughter threatens to bring the dynasty down.

Alaskans test their will and luck against Dark Winter's obstacles.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

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.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

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.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

Alaskans must rely on solid foundations to persist through Dark Winter.

Two brilliant physicists, Albert Einstein and Stephen Hawking have each defined humanity's understanding of the universe but their beliefs on how it works do not always align.

Tigress Raj Bhera has four new cubs whom she must protect while battling rivals who want to steal her lands and overthrow her.

Alaskans must rely on solid foundations to persist through Dark Winter.

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

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

Persued by a group of Utahraptors, a gang of armored dinosaurs battle to reach adulthood.

Nature nerd Dr Ann Jones heads to Rosemary Island, WA to join turtle scientists on their annual nest survey. It's hot work, but worth it: females laying eggs; flatback hatchlings, and she even wrestles a Green Turtle.

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

The crew takes on an adrenaline-filled fishing trip in Argentina.

Four rival families, leopards, hyena, wild dogs and lions, all try to claim a rich corner of Zambian paradise as their home.

Nature nerd Dr Ann Jones heads to Rosemary Island, WA to join turtle scientists on their annual nest survey. It's hot work, but worth it: females laying eggs; flatback hatchlings, and she even wrestles a Green Turtle.

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

The crew takes on an adrenaline-filled fishing trip in Argentina.

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.

Alaskans must rely on solid foundations to persist through Dark Winter.

Two brilliant physicists, Albert Einstein and Stephen Hawking have each defined humanity's understanding of the universe but their beliefs on how it works do not always align.

Tigress Raj Bhera has four new cubs whom she must protect while battling rivals who want to steal her lands and overthrow her.

Alaskans must rely on solid foundations to persist through Dark Winter.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

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

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

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

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

When a tiny piece of trash ruins a raccoon's life, Doctor Jessica cuts it free, but Hope faces tough decisions about its future; a volunteer plunges in to save an injured goose.

Alaskans push through the deep cold to increase their odds of survival.

The Trappist-1 stellar system is home to seven Earth-like planets, and one of them could harbor life; rival teams of visionary pioneers use data to extrapolate entire worlds, leading the search for life on other planets throughout the universe.

For her pups to survive, a young meerkat queen must unite her family in the face of rivals, predators and immense dust storms in the harsh beauty of the Madgadikgadi salt pans of Botswana.

Alaskans push through the deep cold to increase their odds of survival.

Nature nerd Dr Ann Jones heads to Rosemary Island, WA to join turtle scientists on their annual nest survey. It's hot work, but worth it: females laying eggs; flatback hatchlings, and she even wrestles a Green Turtle.

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

The extraordinary story of how the human species, Homo sapiens, first emerged, where the discoveries of recent years are revolutionising the understanding of humanity's origin story.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

Come face to face with some of the strangest hunters of the deep; study the anglerfish's fishing technique and the stoplight loosejaw's terrifying razor-like jaw; Steve witnesses behaviors that have never been caught on camera before.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

Come face to face with some of the strangest hunters of the deep; study the anglerfish's fishing technique and the stoplight loosejaw's terrifying razor-like jaw; Steve witnesses behaviors that have never been caught on camera before.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

Alaskans push through the deep cold to increase their odds of survival.

The Trappist-1 stellar system is home to seven Earth-like planets, and one of them could harbor life; rival teams of visionary pioneers use data to extrapolate entire worlds, leading the search for life on other planets throughout the universe.

For her pups to survive, a young meerkat queen must unite her family in the face of rivals, predators and immense dust storms in the harsh beauty of the Madgadikgadi salt pans of Botswana.

Alaskans push through the deep cold to increase their odds of survival.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

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

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.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

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

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.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

Alaskans stand their ground as winter brings one final barrage.

Analyze the ways in which cold has shaped the physical world, and learn why the definition of frozen may require an update; meet scientists pushing frigid temps to their absolute limit, driving technological developments such as superconductors.

A mother puma must battle rivals, tackle prey nearly three times her size and endure the wild mountain weather of Patagonia in her bid to raise four cubs, her biggest litter yet.

Alaskans stand their ground as winter brings one final barrage.

Come face to face with some of the strangest hunters of the deep; study the anglerfish's fishing technique and the stoplight loosejaw's terrifying razor-like jaw; Steve witnesses behaviors that have never been caught on camera before.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

As the deep cold persists, Alaskans must carry on their way of life.

Following early Homo sapiens's ancestors as they step out of Africa and venture into the wider world, into areas inhabited by other human species.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

As the deep cold persists, Alaskans must carry on their way of life.

Following early Homo sapiens's ancestors as they step out of Africa and venture into the wider world, into areas inhabited by other human species.

The crew takes on an adrenaline-filled fishing trip in Argentina.

Alaskans stand their ground as winter brings one final barrage.

Analyze the ways in which cold has shaped the physical world, and learn why the definition of frozen may require an update; meet scientists pushing frigid temps to their absolute limit, driving technological developments such as superconductors.

A mother puma must battle rivals, tackle prey nearly three times her size and endure the wild mountain weather of Patagonia in her bid to raise four cubs, her biggest litter yet.

Alaskans stand their ground as winter brings one final barrage.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

The highest tides in the world are found in the Bay of Fundy on Canada's east coast.

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.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

The highest tides in the world are found in the Bay of Fundy on Canada's east coast.

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.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

Alaskans brave the awakening landscape as the end of Winter nears.

Helen Czerski reveals how life began when hot met cold, and how every single living creature on Earth depends on temperature for its survival; she witnesses the remarkable surgery that uses temperature to push the human body to the brink of life.

In Amboseli, Kenya, an incredibly rare drought event pushes a struggling elephant family to its limits as their only chance to save their dynasty is to work together and overcome the challenge of a lifetime.

Alaskans brave the awakening landscape as the end of Winter nears.

Australia was once home to a group of animals known as megafauna, giants who lived here for millions of years; in a blink of time, the megafauna disappeared forever; a team of scientists are reopening this paleolithic cold case.

As the deep cold persists, Alaskans must carry on their way of life.

Following early Homo sapiens's ancestors as they step out of Africa and venture into the wider world, into areas inhabited by other human species.

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.

A look at Isaac Newton;a visit to CERN.

Brian Cox explores the fundamental properties of light; the secrets of the cosmos.

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.

A look at Isaac Newton;a visit to CERN.

Brian Cox explores the fundamental properties of light; the secrets of the cosmos.

Alaskans brave the awakening landscape as the end of Winter nears.

Helen Czerski reveals how life began when hot met cold, and how every single living creature on Earth depends on temperature for its survival; she witnesses the remarkable surgery that uses temperature to push the human body to the brink of life.

In Amboseli, Kenya, an incredibly rare drought event pushes a struggling elephant family to its limits as their only chance to save their dynasty is to work together and overcome the challenge of a lifetime.

Alaskans brave the awakening landscape as the end of Winter nears.

When a great horned owl arrives covered in oil, Doctor Sherri must put it through a terrifying, life-saving procedure; boxes of young foxes need help and attention.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

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

Strange aquatic mammals populating a river in Columbia; a ship marooned in a sea of sand along Namibia's notorious Skeleton Coast; a Boeing 727 jetliner hidden in a pine forest; an unusual pattern is discovered in the Nevada desert.

The journey down the attraction-packed Niagara River is filled with adventure and beauty; navigating the fascinating history and engineering of this border river between Canada and the United States, arriving at the world-famous Niagara Falls.

When a tiny fawn gets hit by a car, Doctor Jessica must splint its broken leg or it will never return to the wild; a mother porcupine arrives with baby in tow and both need life-saving attention for a parasitic infection.

For her pups to survive, a young meerkat queen must unite her family in the face of rivals, predators and immense dust storms in the harsh beauty of the Madgadikgadi salt pans of Botswana.

A mother puma must battle rivals, tackle prey nearly three times her size and endure the wild mountain weather of Patagonia in her bid to raise four cubs, her biggest litter yet.

Tigress Raj Bhera has four new cubs whom she must protect while battling rivals who want to steal her lands and overthrow her.

Come face to face with some of the strangest hunters of the deep; study the anglerfish's fishing technique and the stoplight loosejaw's terrifying razor-like jaw; Steve witnesses behaviors that have never been caught on camera before.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

Four rival families, leopards, hyena, wild dogs and lions, all try to claim a rich corner of Zambian paradise as their home.

David Attenborough tells the story of the discovery and reconstruction in Argentina of the world's largest known dinosaur, a brand new species of titanosaur; it now holds the record as the biggest animal ever to walk the earth.

Brian questions how far humans will go in their exploration of the cosmos.

Steve leads a team into the largest unexplored cave network on Earth below the jungles of Mexico, pushing further and deeper than anyone has gone before.

David Attenborough tells the story of the discovery and reconstruction in Argentina of the world's largest known dinosaur, a brand new species of titanosaur; it now holds the record as the biggest animal ever to walk the earth.

Brian questions how far humans will go in their exploration of the cosmos.

Steve leads a team into the largest unexplored cave network on Earth below the jungles of Mexico, pushing further and deeper than anyone has gone before.

David Attenborough tells the story of the discovery and reconstruction in Argentina of the world's largest known dinosaur, a brand new species of titanosaur; it now holds the record as the biggest animal ever to walk the earth.

Brian questions how far humans will go in their exploration of the cosmos.

Steve leads a team into the largest unexplored cave network on Earth below the jungles of Mexico, pushing further and deeper than anyone has gone before.

Brian Cox explores the fundamental properties of light; the secrets of the cosmos.

Hope's team struggles to help two rescued harp seals learn the natural behaviors they will need to survive in the wild.

Witness animal spectacles from high above the Earth; watch a whirling herd of northern nomads; see undersea behemoths show off in the Pacific shallows; track a U.S. porcine stampede; confront top ocean predators on the Florida coast.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

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

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.

A breathtaking journey down the German section of the beautiful Moselle river, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Just as Hope is scrambling to get ready for her busiest day of the year, the government decides to seize the bear cub Hope's worked so hard to save.

Come face to face with some of the strangest hunters of the deep; study the anglerfish's fishing technique and the stoplight loosejaw's terrifying razor-like jaw; Steve witnesses behaviors that have never been caught on camera before.

Trekking across habitats where the rains determine life or death; following an ostrich chick in the fiery Namib desert; a baboon vies for a sip at a watering hole; a maned wolf in a grassy Brazilian oasis.

The story of how plant life turned Earth from a barren rock into a vibrant green world; a four-billion year saga of highs and lows that almost wiped out all life on the planet.

Nature nerd Dr Ann Jones heads to Rosemary Island, WA to join turtle scientists on their annual nest survey. It's hot work, but worth it: females laying eggs; flatback hatchlings, and she even wrestles a Green Turtle.

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

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

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

Persued by a group of Utahraptors, a gang of armored dinosaurs battle to reach adulthood.