BBC Earth

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.