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.

Face off with giant squid, megalodons, and other supersize sea predators.

Leopard Mutima's relationship with her mother is at breaking point, and as the balance of power in Nsefu tips towards the lions, the hyenas and wild dogs fight to raise their young.

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

Face off with giant squid, megalodons, and other supersize sea predators.

Leopard Mutima's relationship with her mother is at breaking point, and as the balance of power in Nsefu tips towards the lions, the hyenas and wild dogs fight to raise their young.

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.

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

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.

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.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

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.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

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.

When a Category 2 hurricane slams straight into the rehab, Hope and her team struggle to protect their patients in the middle of the raging storm.

As winter comes to an end, Alaskans journey, hunt, and prepare for spring.

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.

On Zambia's plains, a cheetah mother and her three growing daughters must travel thousands of kilometers every year to roam their vast territory searching for food; new challenges arise as the wet season arrives and floodwaters advance.

As winter comes to an end, Alaskans journey, hunt, and prepare for spring.

Leopard Mutima's relationship with her mother is at breaking point, and as the balance of power in Nsefu tips towards the lions, the hyenas and wild dogs fight to raise their young.

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.

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.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

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

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

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

As winter comes to an end, Alaskans journey, hunt, and prepare for spring.

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.

On Zambia's plains, a cheetah mother and her three growing daughters must travel thousands of kilometers every year to roam their vast territory searching for food; new challenges arise as the wet season arrives and floodwaters advance.

As winter comes to an end, Alaskans journey, hunt, and prepare for spring.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

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.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

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.

A photographer snaps into action to save a turkey vulture's life after it gets trapped under a seal carcass.

Some tasks in the Arctic require remote Alaskans to venture off trail.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Extreme locales include Mount Everest's Khumbu Icefall, the Grand Canyon, and the slopes of Mount Kilimanjaro.

Some tasks in the Arctic require remote Alaskans to venture off trail.

Levison resumes his journey in Nepal, visiting a crash site 150 meters down a steep cliff.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

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

Dr Ann Jones ventures into the heart of Borneo's jungle to look for wild orangutan, following a team of dedicated scientists whose work is leading to new insights into one of the world's most intelligent & elusive great apes.

Steve is in search of bait balls; these wildlife events can be seen from space, but they are not easy to find.

The trio heads to Thailand where they join an ancient nomadic tribe called the Sea Gypsies.

Leopard Mutima's relationship with her mother is at breaking point, and as the balance of power in Nsefu tips towards the lions, the hyenas and wild dogs fight to raise their young.

Dr Ann Jones ventures into the heart of Borneo's jungle to look for wild orangutan, following a team of dedicated scientists whose work is leading to new insights into one of the world's most intelligent & elusive great apes.

Steve is in search of bait balls; these wildlife events can be seen from space, but they are not easy to find.

The trio heads to Thailand where they join an ancient nomadic tribe called the Sea Gypsies.

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.

Some tasks in the Arctic require remote Alaskans to venture off trail.

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.

Extreme locales include Mount Everest's Khumbu Icefall, the Grand Canyon, and the slopes of Mount Kilimanjaro.

Some tasks in the Arctic require remote Alaskans to venture off trail.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

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.

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.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

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.

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.

When a worldwide pandemic cripples the rehab, wildlife emergencies keep coming in: a bobcat that's been shot, and a massive adult seal; Hope's down to a skeleton crew as critical team members go into quarantine.

Alaskans contend with the throes of the warm season in the Arctic.

Accompanied by his old friend and guide Binod, Levison tracks the mountains from eastern Nepal into the country of Bhutan.

Wonders created by the power of water include Victoria Falls, where men take risks to reach fishing pools; the Camargue, where a man duels with a bull; ocean reefs.

Alaskans contend with the throes of the warm season in the Arctic.

Dr Ann Jones ventures into the heart of Borneo's jungle to look for wild orangutan, following a team of dedicated scientists whose work is leading to new insights into one of the world's most intelligent & elusive great apes.

Steve is in search of bait balls; these wildlife events can be seen from space, but they are not easy to find.

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.

Face off with giant squid, megalodons, and other supersize sea predators.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

When Earth first formed from clouds of dust and gas 4.6 billion years ago, it was devoid of an atmosphere, an inhospitable rock floating in the black void of space.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

When Earth first formed from clouds of dust and gas 4.6 billion years ago, it was devoid of an atmosphere, an inhospitable rock floating in the black void of space.

Alaskans contend with the throes of the warm season in the Arctic.

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.

Wonders created by the power of water include Victoria Falls, where men take risks to reach fishing pools; the Camargue, where a man duels with a bull; ocean reefs.

Alaskans contend with the throes of the warm season in the Arctic.

The first mammal of the year is born.

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.

The first mammal of the year is born.

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.

The first mammal of the year is born.

Alaskans harness the power of the sun as they toil through summer.

The trio heads to Thailand where they join an ancient nomadic tribe called the Sea Gypsies.

Wonders created by life itself include the Amazon forest; a father and son brave killer bees in Bangladesh.

Alaskans harness the power of the sun as they toil through summer.

Emperor penguins cross a dangerous frozen sea to reach their breeding grounds; rockhoppers brave stormy seas and a 300-foot cliff; tropical humboldt penguins face sea lions and vampire bats as they make their way to their desert nests.

Explaining how freshwater is the lifeblood of planet Earth and why animals depend on it for their survival.

When Earth first formed from clouds of dust and gas 4.6 billion years ago, it was devoid of an atmosphere, an inhospitable rock floating in the black void of space.