BBC Earth HD

'S1/E3 - Polar Bears'. Levison travels deep into the vast arctic wilderness of east Greenland to track down some of the most elusive populations of polar bears on the planet. But will he get up close and personal with one?

'Hidden Frontiers: Arabia with Reza Pakravan. S1/E2'. Reza investigates the evidence of Persian leopards' existence in the mountains of Iraqi Kurdistan.

'S1/E1'. Simon Reeve travels through the glorious Lake District National Park.

'S7/E9 - Arctic Discipline'. Sue clears her runway of snow. Denise learns to dogsled. Jessie snares rabbits. Ricko teaches his son Skyler to hunt.

'S1/E2'. Dara explores the darker side of the Sun, from the dangers of skin cancer to solar flares and the Bermuda Triangle of Space. Plus, the world's largest solar furnace.

'S1/E3 - Polar Bears'. Levison travels deep into the vast arctic wilderness of east Greenland to track down some of the most elusive populations of polar bears on the planet. But will he get up close and personal with one?

'S1/E3 - Congo'. In the Congo, ingenious chimpanzees steal honey from hard-working sweat bees by engineering a large stick to smash open the nest.

'S1/E3 - Congo'. In the Congo, ingenious chimpanzees steal honey from hard-working sweat bees by engineering a large stick to smash open the nest.