BBC Earth HD

Alice Roberts is on a train to Ankara on her Ottoman adventure. She visits the tomb of Ataturk who saw out the end of the empire.

Professor Bettany Hughes returns to Azerbaijan for more adventures on the Silk Roads. She crosses the country, hunting out some of the most remote and hidden areas.

Exploring our vital relationship with the Sun, from sun-worship and monuments such as Stonehenge, to how the Sun was formed and where its ferocious power comes from.

Ben travels to Norway to catch up with former Stone Age host Lynx, who now lives in the Norwegian wilderness.

Becky struggles to secure a steady supply of winter water.

After a week in deepest Turkey, Alice Roberts finally arrives in Istanbul to learn about how the clever Ottoman tactics required to wrestle the city from the Romans.

In Varanasi, Bettany takes part in a Hindu ritual which helps her process her own bereavement. She also takes a boat out to the Lake Palace on an island in Lake Pichola.

Professor Bettany Hughes returns to Azerbaijan for more adventures on the Silk Roads. She crosses the country, hunting out some of the most remote and hidden areas.

Exploring our vital relationship with the Sun, from sun-worship and monuments such as Stonehenge, to how the Sun was formed and where its ferocious power comes from.

Ben travels to Norway to catch up with former Stone Age host Lynx, who now lives in the Norwegian wilderness.

Becky struggles to secure a steady supply of winter water.

After a week in deepest Turkey, Alice Roberts finally arrives in Istanbul to learn about how the clever Ottoman tactics required to wrestle the city from the Romans.

In Varanasi, Bettany takes part in a Hindu ritual which helps her process her own bereavement. She also takes a boat out to the Lake Palace on an island in Lake Pichola.

Professor Bettany Hughes returns to Azerbaijan for more adventures on the Silk Roads. She crosses the country, hunting out some of the most remote and hidden areas.

Alice Roberts is on a train to Ankara on her Ottoman adventure. She visits the tomb of Ataturk who saw out the end of the empire.

As the warm season continues, Alaskans contend with the annual environmental changes that shift the daily struggles and rewards of their environment.

Ben journeys into Zambia to live with a British family who have built a safari lodge on the edge of a national park. Ben uncovers what motivates them to keep going.

In Varanasi, Bettany takes part in a Hindu ritual which helps her process her own bereavement. She also takes a boat out to the Lake Palace on an island in Lake Pichola.

Professor Bettany Hughes returns to Azerbaijan for more adventures on the Silk Roads. She crosses the country, hunting out some of the most remote and hidden areas.

Ben travels to Norway to catch up with former Stone Age host Lynx, who now lives in the Norwegian wilderness.

Becky struggles to secure a steady supply of winter water.

In New South Wales, Australia, the worst bushfires in recent history attack multiple towns - overwhelming firefighters and trapping tourists at a lake front caravan park.

On Flores in the Azores, Ben meets a family who live off-grid in a cottage on a steep mountain.

The last few weeks of summer are upon Alaskans, bringing the need for hunting, fishing and harvesting bounty in the Arctic.

Professor Bettany Hughes returns to Azerbaijan for more adventures on the Silk Roads. She crosses the country, hunting out some of the most remote and hidden areas.

Reza explores the possibility of human habitation in an impenetrable canyon system in Oman.

The latest series from the BBC and Sir David Attenborough explores the continent of South America - the most species-rich continent on Earth.

Bettany enjoys the breath-taking journey through the Tamil Nadu hills, between Mettupalayam and Udhagamandalam (Ooty).

After a week in deepest Turkey, Alice Roberts finally arrives in Istanbul to learn about how the clever Ottoman tactics required to wrestle the city from the Romans.

Martin travels to Guam to see the effect of invasive species on remote islands.

Reza investigates the evidence of Persian leopards' existence in the mountains of Iraqi Kurdistan.

Ben returns to Morocco to meet Karen again, who had built a guest house and artists' retreat in this inhospitable location.

Kim and Pierre redouble their efforts to harvest a moose.

Entering The Balkans by sleeper train, Alice Roberts is in Bulgaria's capital Sofia. She'll learn how the empire was controlled from Istanbul and how today the landscape today is almost entirely Soviet.

Bettany enjoys the breath-taking journey through the Tamil Nadu hills, between Mettupalayam and Udhagamandalam (Ooty).

Martin travels to Guam to see the effect of invasive species on remote islands.

Reza investigates the evidence of Persian leopards' existence in the mountains of Iraqi Kurdistan.

Ben returns to Morocco to meet Karen again, who had built a guest house and artists' retreat in this inhospitable location.

Kim and Pierre redouble their efforts to harvest a moose.