BBC Earth

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

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.

Lynn plays surrogate to baby beavers; Zach is forced to follow a seal along the coastline; a patient returns after a release goes wrong.

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.

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

Lynn plays surrogate to baby beavers; Zach is forced to follow a seal along the coastline; a patient returns after a release goes wrong.

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.

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

Lynn plays surrogate to baby beavers; Zach is forced to follow a seal along the coastline; a patient returns after a release goes wrong.

Paddy explores a South Wales factory making Jammie Dodgers, revealing how they produce 4.4 billion biscuits a year; Cherry tests dunking science and Ruth uncovers wartime history.

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.

Paddy explores a South Wales factory making Jammie Dodgers, revealing how they produce 4.4 billion biscuits a year; Cherry tests dunking science and Ruth uncovers wartime history.

Dara tells the story of how the first photograph of the far side of the moon left scientists baffled and tries a virtual reality headset to walk on the moon.

Along the coastline, Zac and Darin take a deep dive into the coral reef restoration techniques supporting a vast underwater ecosystem.

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.

SSimon Reeve embarks on a journey to discover the wild and remote landscapes of South America and their human stories.

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.

SSimon Reeve embarks on a journey to discover the wild and remote landscapes of South America and their human stories.

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.

SSimon Reeve embarks on a journey to discover the wild and remote landscapes of South America and their human stories.

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.

Jennie and Stephanie try to save a harbor seal pup.

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.

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

Jennie and Stephanie try to save a harbor seal pup.

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.

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

Jennie and Stephanie try to save a harbor seal pup.

A tiny turtle hatchling struggles out of her egg, emerging onto the roadside, and faces the task of crossing Highway 60; with the wetland somewhere on the other side of the road, she deals with trucks and roadside predators like ravens and foxes.

From dolphins to cuttlefish, ocean animals possess emotions and behavior similar to humans, including the capacity to love, grieve, deceive and invent.

Ken O'Sullivan explores the marine life of the northern part of the ocean, beginning with the dark waters off the coast of the north of Ireland in winter and the strange animals that can be found there.

Coral Reefs are vibrant undersea cities where life has found ways to survive.

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.

SSimon Reeve embarks on a journey to discover the wild and remote landscapes of South America and their human stories.

In 1989, a ferocious explosion on the sun's surface released a cloud of highly charged particles containing the energy of 20 million nuclear bombs, and this solar superstorm then hit Earth; in Quebec, Canada, the lights suddenly went out.

A look at how gravity affects the world, and even the solar system.

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.

In 1989, a ferocious explosion on the sun's surface released a cloud of highly charged particles containing the energy of 20 million nuclear bombs, and this solar superstorm then hit Earth; in Quebec, Canada, the lights suddenly went out.

A look at how gravity affects the world, and even the solar system.