BBC Earth

Levison Wood is in Botswana hoping to follow the world's largest elephant migration for 650 miles on foot along ancient pathways, but he first must overcome dangers in the bush before tracking a large herd of female elephants.

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.

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

A look at Dr. Savannah's practice and what she's learning about Metis culture.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

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 Ann Jones comes face to face with one of Australia's mightiest predators, the bull shark; she discovers there's much more to them than meets the eye.

A look at Dr. Savannah's practice and what she's learning about Metis culture.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

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

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.

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.

Ireland is small but epic in wonder; surrounded by the Atlantic Ocean, from the 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.

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.

Hitting the streets in Canada's biggest city.

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.

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.

Hitting the streets in Canada's biggest city.

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.

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.

Hitting the streets in Canada's biggest city.

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.

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

A look at Dr. Savannah's practice and what she's learning about Metis culture.

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.

An orphaned baby Triceratops must outwit a deadly Tyrannosaurus rex.

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

A look at Dr. Savannah's practice and what she's learning about Metis culture.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

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

Dara's journey starts in Sicily, home to the mighty Mount Etna - Europe's largest volcano; a journey from Etna to Vesuvius to witness fearsome natural wonders.

The team travels to every corner of the planet over the course of five years.

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.

Dara's journey starts in Sicily, home to the mighty Mount Etna - Europe's largest volcano; a journey from Etna to Vesuvius to witness fearsome natural wonders.

The team travels to every corner of the planet over the course of five years.

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.

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.

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.

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.

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.

Hope fights a problem that kills millions of birds each year in Chicago.

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.

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

Hope fights a problem that kills millions of birds each year in Chicago.

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.

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

Hope fights a problem that kills millions of birds each year in Chicago.

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

Dara's journey starts in Sicily, home to the mighty Mount Etna - Europe's largest volcano; a journey from Etna to Vesuvius to witness fearsome natural wonders.

The team travels to every corner of the planet over the course of five years.

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.

Dara's journey starts in Sicily, home to the mighty Mount Etna - Europe's largest volcano; a journey from Etna to Vesuvius to witness fearsome natural wonders.

The team travels to every corner of the planet over the course of five years.

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.

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

Simon Reeve travels through some of the most remote landscapes on Earth in search of the people and the wildlife of the planet's wildernesses.

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

Simon Reeve travels through some of the most remote landscapes on Earth in search of the people and the wildlife of the planet's wildernesses.

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

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.

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

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

A mysterious predator prowls the streets of a giant metropolis.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

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

A mysterious predator prowls the streets of a giant metropolis.

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

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

A mysterious predator prowls the streets of a giant metropolis.

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

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

Simon Reeve travels through some of the most remote landscapes on Earth in search of the people and the wildlife of the planet's wildernesses.

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

Simon Reeve travels through some of the most remote landscapes on Earth in search of the people and the wildlife of the planet's wildernesses.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

How humans discovered the planets and how they became a complex solar system.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

How humans discovered the planets and how they became a complex solar system.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

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

Explores strongholds abandoned by their architects; a lost city in the Amazon jungle; a desert fortress made by humanity's most notorious empire; explores a city of identical castles; examines a Greek isle's bloody history from the air.

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

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

Hope gets hurt; an owl gets a nasty welcome back to the wild.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

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.

Hope gets hurt; an owl gets a nasty welcome back to the wild.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

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.

Hope gets hurt; an owl gets a nasty welcome back to the wild.

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.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

How humans discovered the planets and how they became a complex solar system.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

Professor Brian Cox explores the solar system's frozen worlds; he meets the dwarf planet where mountains of solid ice float across the surface, the black and white moon painted with frost and a world illuminated by a strange form of ice.

How humans discovered the planets and how they became a complex solar system.

Venus offers a complex story with its thick atmosphere and a substantial amount of matter.

At the top of the planet lies the Arctic Ocean; after four months of winter darkness, the sun returns to reveal a frozen ocean covered in ice; mother polar bears emerge from their hillside dens and lead their cubs down to the sea ice to hunt.

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

Traveling from the frigid, icy waters of Alaska to the balmy, serene seas of the tropics; seeing how varied shark species really are; getting insight into their lives, learning why these endangered creatures are not monsters at all.

At the top of the planet lies the Arctic Ocean; after four months of winter darkness, the sun returns to reveal a frozen ocean covered in ice; mother polar bears emerge from their hillside dens and lead their cubs down to the sea ice to hunt.

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

Traveling from the frigid, icy waters of Alaska to the balmy, serene seas of the tropics; seeing how varied shark species really are; getting insight into their lives, learning why these endangered creatures are not monsters at all.

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.

Peek at landmarks in places where they shouldn't be; wing your way over an imperial pyramid in the Netherlands, a metal sphere in remote Russia, a lion shape carved into an English hillside and a bare swath cut through an Austrian forest.

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.

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 and Dr. Barry journey to Central America to meet frontline wildlife rescuers in the jungles of Costa Rica.

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.

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

Hope and Dr. Barry journey to Central America to meet frontline wildlife rescuers in the jungles of Costa Rica.

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.

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

Hope and Dr. Barry journey to Central America to meet frontline wildlife rescuers in the jungles of Costa Rica.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Scientists uncover clues at a fossil dig site in North Dakota that reveal details about the day an asteroid struck Earth and wiped out the dinosaurs.

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

Traveling from the frigid, icy waters of Alaska to the balmy, serene seas of the tropics; seeing how varied shark species really are; getting insight into their lives, learning why these endangered creatures are not monsters at all.

At the top of the planet lies the Arctic Ocean; after four months of winter darkness, the sun returns to reveal a frozen ocean covered in ice; mother polar bears emerge from their hillside dens and lead their cubs down to the sea ice to hunt.

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

Traveling from the frigid, icy waters of Alaska to the balmy, serene seas of the tropics; seeing how varied shark species really are; getting insight into their lives, learning why these endangered creatures are not monsters at all.

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.

The earth is a machine with its moving parts buried deep beyond our sight; revealing what is beneath our feet.

Revealing what would be left if the planet was drained of its oceans.

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.

The earth is a machine with its moving parts buried deep beyond our sight; revealing what is beneath our feet.

Revealing what would be left if the planet was drained of its oceans.

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

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.

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

Bill Nighy leads a magical journey in the Norfolk Broads along England's holiday river, the River Bure; discovering a watery world where both wildlife and recreation go hand in hand.

Hope and Dr. Barry discover a horrifying problem in Costa Rica where man and monkey cross paths.

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

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

Hope and Dr. Barry discover a horrifying problem in Costa Rica where man and monkey cross paths.

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

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

Hope and Dr. Barry discover a horrifying problem in Costa Rica where man and monkey cross paths.

Traveling the Dordogne River via traditional boats through the green heart of southwest France; drinking wine and hunting for truffles; riding a luxury cruiser to a lighthouse built for a king.

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

The earth is a machine with its moving parts buried deep beyond our sight; revealing what is beneath our feet.

Revealing what would be left if the planet was drained of its oceans.

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

The earth is a machine with its moving parts buried deep beyond our sight; revealing what is beneath our feet.

Revealing what would be left if the planet was drained of its oceans.

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.

Lev and his guide, Kane, journey across the salt pans to track bull elephants, but their safety is soon jeopardized when they encounter a herd during mating season.

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.

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.

Lev and his guide, Kane, journey across the salt pans to track bull elephants, but their safety is soon jeopardized when they encounter a herd during mating season.