BBC Earth

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.

As daylight fades, Alaskans contend with threats lurking in the shadows.

Shocking new insights into the demise of modern humans' sister species, the Neanderthals, Homo sapiens's possible role in their downfall and how it become the last human species on Earth.

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

As daylight fades, Alaskans contend with threats lurking in the shadows.

Shocking new insights into the demise of modern humans' sister species, the Neanderthals, Homo sapiens's possible role in their downfall and how it become the last human species on Earth.

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

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

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.

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.

Hope struggles to save a seal for the first time.

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

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

Hope struggles to save a seal for the first time.

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

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

Hope struggles to save a seal for the first time.

Alaskans must capitalize on the resources of the Arctic Summer.

Explorer Levison Wood tracks down some of the planet's most iconic but threatened animals; travelling into some of the most remote environments on Earth, Levison enters their worlds as the locals do to get as up close and personal as possible.

People surviving in the high Himalaya, the Canadian Arctic, and the blistering Australian outback.

Alaskans must capitalize on the resources of the Arctic Summer.

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

As daylight fades, Alaskans contend with threats lurking in the shadows.

Shocking new insights into the demise of modern humans' sister species, the Neanderthals, Homo sapiens's possible role in their downfall and how it become the last human species on Earth.

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.

Professor Brian Cox grapples with science's darker side, asking why it often gets such a bad press; Brian wonders if science can go too far.

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.

Professor Brian Cox grapples with science's darker side, asking why it often gets such a bad press; Brian wonders if science can go too far.

Alaskans must capitalize on the resources of the Arctic Summer.

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

People surviving in the high Himalaya, the Canadian Arctic, and the blistering Australian outback.

Alaskans must capitalize on the resources of the Arctic Summer.

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.

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.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

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.

New York's Hudson River stretches 315 miles through natural landscapes, from the Adirondack Mountains to the George Washington Bridge and Statue of Liberty.

The first mammal of the year is born.

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.

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

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

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.

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.

David Attenborough joins a team of researchers in their efforts to discover the secrets of a 200-million-year-old giant sea dragon fossil.

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

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.

David Attenborough joins a team of researchers in their efforts to discover the secrets of a 200-million-year-old giant sea dragon fossil.

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

Steve heads into Yucatan, Mexico, on the trail of the ancient Maya, uncovering secrets and artifacts.

David Attenborough joins a team of researchers in their efforts to discover the secrets of a 200-million-year-old giant sea dragon fossil.

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

Steve heads into Yucatan, Mexico, on the trail of the ancient Maya, uncovering secrets and artifacts.

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

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.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

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.

Bill Nighy narrates a trip along the River Po, traveling across northern Italy from the snow-capped Alps to the delta where it meets the Adriatic Sea.

Hope struggles to save a seal for the first time.

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.

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.

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.

The male penguins hand over their newborns to the returning females.

Seeking a mate, leopard Olimba begins a new chapter, but in her way is her daughter; the hyenas' strength is growing, but a flooded den spells disaster, and the clan become separated.

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

The male penguins hand over their newborns to the returning females.

Seeking a mate, leopard Olimba begins a new chapter, but in her way is her daughter; the hyenas' strength is growing, but a flooded den spells disaster, and the clan become separated.

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.

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

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.

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

People surviving in the high Himalaya, the Canadian Arctic, and the blistering Australian outback.

A new volunteer and a raven become roommates at the rehab.

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

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

A new volunteer and a raven become roommates at the rehab.

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

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

A new volunteer and a raven become roommates at the rehab.

The warm season provides for Alaskans.

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.

In many of the world's natural wonders there is an abundance of animals, which can either be a threat to the people who live there or provide a means of survival.

The warm season provides for Alaskans.

Seeking a mate, leopard Olimba begins a new chapter, but in her way is her daughter; the hyenas' strength is growing, but a flooded den spells disaster, and the clan become separated.

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 and 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.

Shocking new insights into the demise of modern humans' sister species, the Neanderthals, Homo sapiens's possible role in their downfall and how it become the last human species on Earth.

Levison Wood sets out to walk the length of the River Nile from source to sea; his nine-month, seven-million-step journey takes him through jungles, savannah, deserts, cities and war zones in some of Africa's most remote and spectacular locations.

Lev and his guide Boston are 1100 miles and four months into their journey, in the world's newest nation, South Sudan; arriving in the capital, Juba, Lev and Boston are arrested by secret police.

The dangerous journey of the Pachyrhinosaurus, where survival is at stake during the annual migration hundreds of miles north.

Levison Wood sets out to walk the length of the River Nile from source to sea; his nine-month, seven-million-step journey takes him through jungles, savannah, deserts, cities and war zones in some of Africa's most remote and spectacular locations.

Lev and his guide Boston are 1100 miles and four months into their journey, in the world's newest nation, South Sudan; arriving in the capital, Juba, Lev and Boston are arrested by secret police.