BBC Earth

Filmed over 72 days across Africa, this documentary explores the possible extinction of elephants within the next 50 years.

Five months and more than 2000 miles into his journey, Lev is in Sudan, facing his biggest physical obstacle yet: the Sahara desert; he has to walk 1300 miles across one of the most inhospitable places on Earth.

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.

There's a new employee at Rocky Rapids Vet. Clinic, Dr. Dayle Poitras, a newly graduated Métis vet excited about landing her first full-time gig; Savannah is keen to mentor young Dayle while learning about what it means to be Métis.

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

Alaskans must overcome rising waters to capitalize on spring's offerings.

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.

There's a new employee at Rocky Rapids Vet. Clinic, Dr. Dayle Poitras, a newly graduated Métis vet excited about landing her first full-time gig; Savannah is keen to mentor young Dayle while learning about what it means to be Métis.

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

Alaskans must overcome rising waters to capitalize on spring's offerings.

Meandering through the black waters of a primordial river immortalized in a folk song.

Come across a set of disturbingly familiar stone monoliths in Colombia, then explore a lost city in the Sierra Nevada de Santa Marta; puzzle over an ancient ruin in Corinth, Greece, and explore an old structure on a Maltese island.

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

Meandering through the black waters of a primordial river immortalized in a folk song.

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

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

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

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

A bobcat kitten needs Hope's help but this little orphan causes big headaches.

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.

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

Five months and more than 2000 miles into his journey, Lev is in Sudan, facing his biggest physical obstacle yet: the Sahara desert; he has to walk 1300 miles across one of the most inhospitable places on Earth.

Pursued by a group of Utahraptors, a gang of armored dinosaurs battles to reach adulthood.

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.

There's a new employee at Rocky Rapids Vet. Clinic, Dr. Dayle Poitras, a newly graduated Métis vet excited about landing her first full-time gig; Savannah is keen to mentor young Dayle while learning about what it means to be Métis.

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

Alaskans must overcome rising waters to capitalize on spring's offerings.

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

Sir David Attenborough reveals new animal behaviors in the ocean.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

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

Sir David Attenborough reveals new animal behaviors in the ocean.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

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.

Unlock an abandoned site on a remote Antarctic isle and check out mysterious shapes in the Finnish snow; puzzle over an inexplicable monolith in the far reaches of Norway, then get shocked by a blood-red frozen waterfall at the bottom of the world.

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

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.

Hope Swinimer rescues, rehabilitates and releases thousands of animals while struggling to make ends meet.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

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

Hope Swinimer rescues, rehabilitates and releases thousands of animals while struggling to make ends meet.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

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

Hope Swinimer rescues, rehabilitates and releases thousands of animals while struggling to make ends meet.

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.

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

Sir David Attenborough reveals new animal behaviors in the ocean.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

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

Sir David Attenborough reveals new animal behaviors in the ocean.

Exploring the worst mass extinction the planet has ever seen, when as much as 90% of all species died 252 million years ago; this moment in Earth's history took life to the brink, wreaking havoc and destruction on an unprecedented scale.

Simon focuses on the most incredible wildlife stories from his adventures.

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 focuses on the most incredible wildlife stories from his adventures.

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 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.

Puzzle over an out-of-place relic from World War II and get a bird's-eye view of stone circles in Norway; examine mysterious, ancient mounds on the banks of the Mississippi and uncover the dark history of a medieval English village.

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

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.

Preparations for Hope's open house are derailed when a patient goes missing; the event may be too successful for its own good.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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.

Preparations for Hope's open house are derailed when a patient goes missing; the event may be too successful for its own good.

The view from above reveals baffling behavior from one of the ocean's fastest fish; whales with a strange, aquatic accessorizing habit; a confounding congregation of sharks down under; a perplexing collection of circles decorating the seabed.

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.

Preparations for Hope's open house are derailed when a patient goes missing; the event may be too successful for its own good.

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.

Simon focuses on the most incredible wildlife stories from his adventures.

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 focuses on the most incredible wildlife stories from his adventures.

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.

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.

A look at Isaac Newton;a visit to CERN.

Jupiter, Saturn, Uranus and Neptune all have exotic atmospheres, liquid interiors and rings.

The history of the solar system might be preserved out in the dark domain of Pluto and beyond.

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.

A look at Isaac Newton;a visit to CERN.