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

Exploring the evolutionary path of the Tyrannosaurus rex; following the journey of two dinosaur brothers and the theoretical evolution from smaller dinosaurs originating in Asia based on fossil findings in China.

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

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.

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.

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.

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

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

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

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

Alaskans enter a new dawn in the Arctic winter.

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.

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.

Alaskans enter a new dawn in the Arctic winter.

Alaskans enter a new dawn in the Arctic winter.

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.

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.

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.

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.

Alaskans enter a new dawn in the Arctic winter.

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.

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.

Alaskans enter a new dawn in the Arctic winter.

Hope opens her doors to the public.

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.

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.

Hope opens her doors to the public.

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.

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.

Hope opens her doors to the public.

Alaska residents labor their way through winter's challenges.

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.

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.

Alaska residents labor their way through winter's challenges.

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.

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 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.

Alaska residents labor their way through winter's challenges.

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 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.

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.

Alaska residents labor their way through winter's challenges.

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.

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.

Alaska residents labor their way through winter's challenges.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

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.

The staff steps up to release the few remaining patients, when Hope suffers a personal tragedy.

Alaskans confront the environment and themselves as winter bears down.

From space, satellite cameras reveal that Earth is a kaleidoscope of color; turquoise plankton blooms trigger a feeding frenzy, China turns yellow with rapeseed flowers, and mysterious green lights appear in the ocean.

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

Alaskans confront the environment and themselves as winter bears down.

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 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.

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

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.

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.

Alaskans confront the environment and themselves as winter bears down.

From space, satellite cameras reveal that Earth is a kaleidoscope of color; turquoise plankton blooms trigger a feeding frenzy, China turns yellow with rapeseed flowers, and mysterious green lights appear in the ocean.

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

Alaskans confront the environment and themselves as winter bears down.

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

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.

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

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.

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

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.

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 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.

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

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.