BBC Earth Astro

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

Venice is under attack from climate change. Flooding is becoming more frequent. Can scientists and engineers find ways to protect this unique jewel of architecture and culture before it's too late?

Hannah Fry discovers why innovations in meat packing almost derailed the electric car revolution and how a breakthrough in camcorder batteries led to Elon Musk's electric empire.

Nick learns about Civil Rights activist Medgar Evers, and paddles on the river at sunset.

Venice is under attack from climate change. Flooding is becoming more frequent. Can scientists and engineers find ways to protect this unique jewel of architecture and culture before it's too late?

All life is driven by the need to breed. Yet for a few, the odds of success are overwhelmingly against them, so these have adopted the most extraordinary mating strategies of all.

Joanna starts her 2000 mile journey across Japan in Hokkaido.

In the first instalment Joanna explores the incredible islands of Japan, before jumping on board the Trans-Siberian Railway into Russia.

One of the several reinforced concrete highway overpasses constructed in the 1960s was Seoullo 7017. This deteriorating liability was transformed into an elevated green park by Dutch architects MVRDV.

Wild and unpredictable, the Scandinavian coast is a place of haunting beauty and dangerous extremes, home to feisty puffins, orcas, eagles, otters and intrepid base jumpers.

Joanna starts her 2000 mile journey across Japan in Hokkaido.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

One of the several reinforced concrete highway overpasses constructed in the 1960s was Seoullo 7017. This deteriorating liability was transformed into an elevated green park by Dutch architects MVRDV.

In the first instalment Joanna explores the incredible islands of Japan, before jumping on board the Trans-Siberian Railway into Russia.

Joanna starts her 2000 mile journey across Japan in Hokkaido.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

One of the several reinforced concrete highway overpasses constructed in the 1960s was Seoullo 7017. This deteriorating liability was transformed into an elevated green park by Dutch architects MVRDV.

British comedian and travel enthusiast Griff Rhys Jones explores the Frozen Wilds of Manitoba, North Canada, and visits a town that sometimes has more polar bears than people.

Wild and unpredictable, the Scandinavian coast is a place of haunting beauty and dangerous extremes, home to feisty puffins, orcas, eagles, otters and intrepid base jumpers.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

Professor Brian Cox explores the solar system's hidden realms, between and beyond the planets, where countless worlds lie hiding in the darkness.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Hannah Fry discovers why innovations in meat packing almost derailed the electric car revolution and how a breakthrough in camcorder batteries led to Elon Musk's electric empire.

Simon revisits the incredible characters he's met while travelling the globe.

Professor Brian Cox explores the solar system's hidden realms, between and beyond the planets, where countless worlds lie hiding in the darkness.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

Hannah Fry discovers why innovations in meat packing almost derailed the electric car revolution and how a breakthrough in camcorder batteries led to Elon Musk's electric empire.

Simon revisits the incredible characters he's met while travelling the globe.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Professor Brian Cox explores the solar system's hidden realms, between and beyond the planets, where countless worlds lie hiding in the darkness.

Record-breaking Hurricane Otis devastates holiday hotspot Acapulco on Mexico's coast.

The best of David Attenborough's early adventures as never seen before - in colour - and with it the story of how the pioneering television series Zoo Quest was made.

President Barack Obama and Bear Grylls explore the Alaskan wilderness, where they observe evidence of climate change, sample wild salmon and catkins tea made with water from melting glaciers.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Professor Brian Cox explores the solar system's hidden realms, between and beyond the planets, where countless worlds lie hiding in the darkness.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

Record-breaking Hurricane Otis devastates holiday hotspot Acapulco on Mexico's coast.

What draws humans to the coldest and most hostile reaches of our planet?

The best of David Attenborough's early adventures as never seen before - in colour - and with it the story of how the pioneering television series Zoo Quest was made.

Paul departs from Tokyo and travels northward by bullet train, pausing to soak in the serene mountain springs of Unazuki Onsen, before exploring the art of shimmering Kanazawa gold leaf.

Paul explores the remote, thatched villages of Gokayama, through Niigata's rice paddies on a special sake train, to the washi paper mills of Echizen, and the ancient, spiritual waters of Lake Biwa.

Record-breaking Hurricane Otis devastates holiday hotspot Acapulco on Mexico's coast.

President Barack Obama and Bear Grylls explore the Alaskan wilderness, where they observe evidence of climate change, sample wild salmon and catkins tea made with water from melting glaciers.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

The best of David Attenborough's early adventures as never seen before - in colour - and with it the story of how the pioneering television series Zoo Quest was made.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

From the Poles to the highest mountain peaks, there are surprising frozen worlds found on every continent - home to unique and remarkable animals.

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

After a breathtaking repel from a helicopter, Bear and Hollywood actor Vanessa Hudgens evade a boulder avalanche, summit a massive dormant volcano, and come face-to-face with a rattlesnake.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

After a breathtaking repel from a helicopter, Bear and Hollywood actor Vanessa Hudgens evade a boulder avalanche, summit a massive dormant volcano, and come face-to-face with a rattlesnake.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

After a breathtaking repel from a helicopter, Bear and Hollywood actor Vanessa Hudgens evade a boulder avalanche, summit a massive dormant volcano, and come face-to-face with a rattlesnake.

Whilst humans are prone to fighting the inevitability of ageing, trees have perfected the art of aging gracefully. In this episode, we will discover how mature trees do incredible things to thrive.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

After a breathtaking repel from a helicopter, Bear and Hollywood actor Vanessa Hudgens evade a boulder avalanche, summit a massive dormant volcano, and come face-to-face with a rattlesnake.

Simon revisits the incredible characters he's met while travelling the globe.

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

At the top of our planet lies the Arctic Ocean - a shape-shifting world of ice and water, home to unique animals like polar bears, harp seals and bowhead whales.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

After a breathtaking repel from a helicopter, Bear and Hollywood actor Vanessa Hudgens evade a boulder avalanche, summit a massive dormant volcano, and come face-to-face with a rattlesnake.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Nick Jonas joins Bear for a snowy mountain adventure in the Sierra Nevada during blizzard conditions. The guys rappel down a sheer cliff, eat a frozen bird and swim across a freezing lake.

The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground.

Simon looks at his journeys through some of the world's most spectacular and unspoilt wildernesses, and reflects on the huge challenges faced when trying to protect them.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Nick Jonas joins Bear for a snowy mountain adventure in the Sierra Nevada during blizzard conditions. The guys rappel down a sheer cliff, eat a frozen bird and swim across a freezing lake.

The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground.

Simon looks at his journeys through some of the world's most spectacular and unspoilt wildernesses, and reflects on the huge challenges faced when trying to protect them.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Nick Jonas joins Bear for a snowy mountain adventure in the Sierra Nevada during blizzard conditions. The guys rappel down a sheer cliff, eat a frozen bird and swim across a freezing lake.

The plot thickens. As the team uncovers the remains of fearsome Jurassic predators, they consider the possibility that the site was a dinosaur hunting ground.

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Nick Jonas joins Bear for a snowy mountain adventure in the Sierra Nevada during blizzard conditions. The guys rappel down a sheer cliff, eat a frozen bird and swim across a freezing lake.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Simon looks at his journeys through some of the world's most spectacular and unspoilt wildernesses, and reflects on the huge challenges faced when trying to protect them.

Found on every continent, mountains create unique frozen worlds, home to extraordinary animals that must overcome the crushing conditions of the cold.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Nick Jonas joins Bear for a snowy mountain adventure in the Sierra Nevada during blizzard conditions. The guys rappel down a sheer cliff, eat a frozen bird and swim across a freezing lake.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Simon looks at his journeys through some of the world's most spectacular and unspoilt wildernesses, and reflects on the huge challenges faced when trying to protect them.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

In Arizona, lightning strikes from so high above the ground, through such clear air, that it creates the perfect conditions for the most electrifying show on Earth.

Marshawn Lynch joins Bear on the French island of Corsica, where they chase a wild hog, navigate cliffs and encounter the French Foreign Legion.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

In Arizona, lightning strikes from so high above the ground, through such clear air, that it creates the perfect conditions for the most electrifying show on Earth.

Marshawn Lynch joins Bear on the French island of Corsica, where they chase a wild hog, navigate cliffs and encounter the French Foreign Legion.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

In Arizona, lightning strikes from so high above the ground, through such clear air, that it creates the perfect conditions for the most electrifying show on Earth.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

Antarctica is the most hostile of all Earth's frozen worlds. Yet even here, life finds a way not just to survive but to thrive.

Professor Brian Cox explores the solar system's wildest weather, encountering powerful lightning, strange metallic frosts and monsoon rains on a moon a billion kilometres from Earth.

First constructed in the 1930s, the West Side Line - an elevated viaduct section of the New York Central Railroad - was abandoned in the 1980s. But since 2009 it's been totally revitalised.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

Julianne Hough joins Bear on a trek in Africa, where they encounter a pack of elephants blocking their path. Other challenges include dealing with big cats and a snake; rappelling from a cliff; and na

Griff Rhys Jones explores the prairies and vast sprawling plains of both Saskatchewon and Alberta provinces and discovers they reveal riches from fossils to farmland.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

Lindsey Vonn joins Bear on the French island of Corsica, where they rappel down a rock wall, use a spear gun, swim and dine on sea urchins.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Tea is sustenance for mind, body and soul - the very lifeblood of humanity. The tribal De'ang people high in the mountains of Yunnan Province believe themselves to be literally made of tea.

A devastating typhoon in the Philippines destroys communities, leaving millions homeless.

Lindsey Vonn joins Bear on the French island of Corsica, where they rappel down a rock wall, use a spear gun, swim and dine on sea urchins.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Tea is sustenance for mind, body and soul - the very lifeblood of humanity. The tribal De'ang people high in the mountains of Yunnan Province believe themselves to be literally made of tea.

A devastating typhoon in the Philippines destroys communities, leaving millions homeless.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Tea is sustenance for mind, body and soul - the very lifeblood of humanity. The tribal De'ang people high in the mountains of Yunnan Province believe themselves to be literally made of tea.

A devastating typhoon in the Philippines destroys communities, leaving millions homeless.

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

First constructed in the 1930s, the West Side Line - an elevated viaduct section of the New York Central Railroad - was abandoned in the 1980s. But since 2009 it's been totally revitalised.

Alexander heads for the paradise isle of the Indian Ocean, discovering its golden sands and historic culture, visiting the fortress town of Galle, a mask making factory and an elephant sanctuary.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

Tea is sustenance for mind, body and soul - the very lifeblood of humanity. The tribal De'ang people high in the mountains of Yunnan Province believe themselves to be literally made of tea.

Steve Backshall tracks cheetahs across Zambia by motorbike, witnessing epic hunting and the challenges faced by this endangered predator.

Steve dives with 100 grey nurse sharks - aka ragged-tooth sharks - a wobbegong and a gigantic whale shark, and he joins a mission in Indonesia to save sharks from over-fishing with eco-tourism.

Magical forests wrap around a labyrinth of waterways in Scandinavia's heartlands. Here, lynxes, wolves and reindeer survive the ever-changing seasons through surprising alliances

Joanna catches a bullet train straight into the metropolitan sprawl of Tokyo, before heading to the ancient capital of Kyoto with its stunning temples and shrines.

First constructed in the 1930s, the West Side Line - an elevated viaduct section of the New York Central Railroad - was abandoned in the 1980s. But since 2009 it's been totally revitalised.

Joanna visits Iran, exploring the tomb of Cyrus the Great before following the Silk Road through Azerbaijan, Georgia and on to Venice. Then she's off to Haiti and Cuba for some more unseen adventures.

Tea is sustenance for mind, body and soul - the very lifeblood of humanity. The tribal De'ang people high in the mountains of Yunnan Province believe themselves to be literally made of tea.

Feast your eyes on structural marvels brought to life when engineers are forced to go underground.

In Arizona, lightning strikes from so high above the ground, through such clear air, that it creates the perfect conditions for the most electrifying show on Earth.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.