BBC Earth

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.

Uncovering surprising undersea relationships and connections as sharks befriend fish and whales play with dolphins.

Simon reflects on the modern threats to the world's spectacular wilderness.

Wander through the parched Kalahari Desert in search of wildlife, including one of Africa's largest elephant enclaves; go hunting with a group of San trackers who still live in the traditional way, then encounter the region's famous lions.

Go from Chile's Atacama Desert to the tip of Tierra del Fuego, where Simon wraps up his journey; See the effects of fast fashion waste, the havoc inflation is wreaking on Argentina, and an Indigenous group entangled in a Chilean political crisis.

Hope opens her doors to the public.

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

Hope opens her doors to the public.

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

Hope opens her doors to the public.

Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

Examining how cosmic rays are produced and what that can tell us about the universe.

At the very end of East Africa's Great Rift Valley, there's a "land that time forgot"; the rolling grasslands of the Luangwa Valley.

Mercury, one of the nearest planets to earth, has eluded astronomers' best efforts to learn its secrets until missions like Mariner and Messenger.

Examining how cosmic rays are produced and what that can tell us about the universe.

Uncovering surprising undersea relationships and connections as sharks befriend fish and whales play with dolphins.

Ken O'Sullivan explores the dark ocean waters to the north of Ireland in winter time, encountering monstrous winter storms of the high latitudes.

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.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest; in Brazil's Atlantic forest, a family of golden headed lion tamarins travel to the edge of their world and find a strange land of plenty.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest; in Brazil's Atlantic forest, a family of golden headed lion tamarins travel to the edge of their world and find a strange land of plenty.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest; in Brazil's Atlantic forest, a family of golden headed lion tamarins travel to the edge of their world and find a strange land of plenty.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

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.

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.

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

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

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.

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

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

The team looks inside a waterhole ecosystem in Mwiba Wildlife Reserve in Tanzania; elephants, Cape buffalo and lions make it a home.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

Exploring an unmapped volcanic underworld in search of the longest lava tube in Arabia.

The team looks inside a waterhole ecosystem in Mwiba Wildlife Reserve in Tanzania; elephants, Cape buffalo and lions make it a home.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest; in Brazil's Atlantic forest, a family of golden headed lion tamarins travel to the edge of their world and find a strange land of plenty.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

Dara looks into the formation of the Sun and heads to Texas to witness a solar eclipse.

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.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Dara looks into the formation of the Sun and heads to Texas to witness a solar eclipse.

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.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Dara looks into the formation of the Sun and heads to Texas to witness a solar eclipse.

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.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

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.

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.

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.

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

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.

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.

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

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

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.

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.

Paddy McGuinness and Cherry Healey hit factory floors across Britain for a snoop around their supersized production lines to reveal what the secrets are behind supermarket staples.

Dara looks into the formation of the Sun and heads to Texas to witness a solar eclipse.

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.

Zac and Darin test their cooking skills in Melbourne, Australia, before heading to the Torres Strait Islands to understand the impact of rising sea levels.

Simon revisits the incredible characters he's met during his travels.

Battle your way through Earth's second-greatest rainforest; follow Simon across 500 miles of dense tropical jungle full of biting insects and peat bogs to reach the Salonga region; enjoy an emotional encounter with a group of wild bonobos.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

Simon revisits the incredible characters he's met during his travels.

Battle your way through Earth's second-greatest rainforest; follow Simon across 500 miles of dense tropical jungle full of biting insects and peat bogs to reach the Salonga region; enjoy an emotional encounter with a group of wild bonobos.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

Simon revisits the incredible characters he's met during his travels.

Battle your way through Earth's second-greatest rainforest; follow Simon across 500 miles of dense tropical jungle full of biting insects and peat bogs to reach the Salonga region; enjoy an emotional encounter with a group of wild bonobos.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

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.

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.

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

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.

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.

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

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.

In Taiwan, a Formosan pangolin travels through a land of giants to find a mate in a protected forest; in Brazil's Atlantic forest, a family of golden headed lion tamarins travel to the edge of their world and find a strange land of plenty.

Uncovering surprising undersea relationships and connections as sharks befriend fish and whales play with dolphins.

Ken O'Sullivan explores the dark ocean waters to the north of Ireland in winter time, encountering monstrous winter storms of the high latitudes.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

Simon revisits the incredible characters he's met during his travels.

Battle your way through Earth's second-greatest rainforest; follow Simon across 500 miles of dense tropical jungle full of biting insects and peat bogs to reach the Salonga region; enjoy an emotional encounter with a group of wild bonobos.

Simon travels from the Arctic islands of Svalbard to the icy wilderness of Lapland.

The space telescope Hipparcos led to a discovery that sent shockwaves throughout the astronomical community: a star appearing to be older than the universe itself.

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

The Fermi Paradox asks why another civilization has not presented itself.

Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

The space telescope Hipparcos led to a discovery that sent shockwaves throughout the astronomical community: a star appearing to be older than the universe itself.

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

The Fermi Paradox asks why another civilization has not presented itself.

Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

The space telescope Hipparcos led to a discovery that sent shockwaves throughout the astronomical community: a star appearing to be older than the universe itself.

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

The Fermi Paradox asks why another civilization has not presented itself.

Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

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.

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.

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

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.

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.

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

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

Brian takes a fresh look at the astonishing concept of gravity.

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

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

Brian takes a fresh look at the astonishing concept of gravity.

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

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

The Fermi Paradox asks why another civilization has not presented itself.

Examining Landsat 8, the advanced planetary explorer with a 900 million dollar price tag, which is designed to reveal complex and ever-changing details undetectable by the human eye.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

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

Steve Backshall and his team travel to Kyrgyzstan in search of snow leopards, one of the world's most endangered species.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

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

Steve Backshall and his team travel to Kyrgyzstan in search of snow leopards, one of the world's most endangered species.

Journey from the lava ramparts to its fiery heart, discovering how this place became one of the most important areas of biodiversity in the world.

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

Steve Backshall and his team travel to Kyrgyzstan in search of snow leopards, one of the world's most endangered species.

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.

Examine mysterious holes in Israel; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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

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

Examine mysterious holes in Israel; explore a ghost village hidden in the Colombian jungle, a shipwreck off the coast of Sri Lanka and a gutted airplane fuselage abandoned in Iceland.

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

Professor Brian Cox explores how the universe began and how it will end.

Fifty years since the last moon landing, Associate Professor Alan Duffy talks about the new space race, where innovators and big dreamers are rewriting the rule book on space exploration.

Scientists search for the smallest thing in our universe.

Professor Brian Cox explores how the universe began and how it will end.

Fifty years since the last moon landing, Associate Professor Alan Duffy talks about the new space race, where innovators and big dreamers are rewriting the rule book on space exploration.

Scientists search for the smallest thing in our universe.

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

Steve Backshall and his team travel to Kyrgyzstan in search of snow leopards, one of the world's most endangered species.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.

A glimpse into an African waterhole's bustling nightlife where summer's heat changes animals' drinking and cooling-off patterns and a new predator is drawn by increased nocturnal activity.

The big blue is the world's greatest wilderness, far from shore and many kilometers deep.