BBC Earth HD

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

Alaskans soldier through the heart of dark winter in pursuit of the resources they desperately need for survival.

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

Sue continues to restore her cabin. Ricko travels with his son to the family cabin. Jessie gathers firewood. The Hailstones go muskox hunting.

Nick starts with a helicopter ride along the northernmost stretch of the Mississippi.

Ben Fogle meets Rhona Mitra who has swapped her home in Hollywood for a remote farmhouse in Uruguay.

Alaskans test their will and luck against Dark Winter's obstacles.

The trio are inspired to step out of their own comfort zone as they prepare to emulate Isabella's most impressive feat - summitting a 14,000ft mountain.

From freshwater jungle ponds to the dark depths of the open ocean, air breathing mammals have found remarkable ways to overcome the many challenges of a life in water.

As our characters bring new life into peaceful times, a great storm is building which transforms their welcoming world into a wet nightmare.

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

Michael Portillo travels from the coal mines of Newcastle, New South Wales, to Brisbane, crossing the mighty Hawkesbury River.

Cowboys and the world's largest retractable roof. This $1.2 billion stadium can house over 100,000 fans, and we'll go inside how this engineering feat was built.

From ice-covered seas to snow-capped mountains, mammals have conquered the cold, living in the harshest places on earth, thanks to their remarkable intelligence and adaptations.

Adventurer Ben Fogle returns to the Pembrokeshire coast to catch up with Matthew and Charis Watkinson, and their two children.

Sue collects firewood. Ricko and his son Skyler go beaver trapping. Jessie explores his newly purchased land. The Hailstones move up river.

Starting in Alexandria, Alice searches for Cleopatra, discovers how the Romans and the Greeks reacted to the treasures of Ancient Egypt, and learns how a slave became a sultan and built his own caste.

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