BBC Earth

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.

As the land dries, everyone struggles to find water; the hippos get trapped in the shrinking lake, and Nalla the elephant finds a clever solution to quench everyone's thirst.

Alaskans confront the environment and themselves as winter bears down.

The open house is bigger than ever, which brings about more challenges.

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

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.

The open house is bigger than ever, which brings about more challenges.

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

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.

The open house is bigger than ever, which brings about more challenges.

Alaskans rediscover old practices to get through the heart of winter.

Levison and Alberto explore a vampire bat-infested cave, the Panama Canal and modern Panama City.

As the animal families escape the drought, the land returns to its former beauty; new life is born, old rivalries are laid to rest, and new alliances are forged.

Alaskans rediscover old practices to get through the heart of winter.

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

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.

Trek into the heart of the Suriname jungle with Steve and the crew, who are on the hunt for some special creatures hiding in the shadows; they search for poison dart frogs, deadly snakes and the elusive giant river otter.

The guys head to the turquoise waters of The Bahamas to try to catch venomous lionfish.

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.

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.

Trek into the heart of the Suriname jungle with Steve and the crew, who are on the hunt for some special creatures hiding in the shadows; they search for poison dart frogs, deadly snakes and the elusive giant river otter.

The guys head to the turquoise waters of The Bahamas to try to catch venomous lionfish.

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

Alaskans rediscover old practices to get through the heart of winter.

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.

As the animal families escape the drought, the land returns to its former beauty; new life is born, old rivalries are laid to rest, and new alliances are forged.

Alaskans rediscover old practices to get through the heart of winter.

Never seen before footage of Hope's greatest stories.

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.

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.

Never seen before footage of Hope's greatest stories.

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.

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.

Never seen before footage of Hope's greatest stories.

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

Levison begins his journey in Afghanistan's remote and inhospitable Wakhan Corridor.

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

Alaskans take advantage of a brief reprieve from Dark Winter's wrath.

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.

Trek into the heart of the Suriname jungle with Steve and the crew, who are on the hunt for some special creatures hiding in the shadows; they search for poison dart frogs, deadly snakes and the elusive giant river otter.

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

Levison and his San guide, Kane, follow ancient nomadic hunting routes to stalk the last 100 desert lions of Namibia.

Nominations for the Earthshot Prize to Fix Our Climate are revealed as Prince William, Sir David Attenborough and Christiana Figueres, who led negotiations for the Paris Agreement on climate change, highlight inspiring solutions.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.

How dramatic twists in Earth's story enabled humans to go from being part of nature to controlling it.

Nominations for the Earthshot Prize to Fix Our Climate are revealed as Prince William, Sir David Attenborough and Christiana Figueres, who led negotiations for the Paris Agreement on climate change, highlight inspiring solutions.

Sir David Attenborough explores the dangerous frontiers created by the world's coasts, where animals fight for survival amid constant change; there are some unexpected residents on Namibia's Skeleton Coast.