Arctic, Wide shot of a polar bear emerging from icy waters onto sheet ice and yawning tiredly.

Medium shot of an adult polar bear leading two grown cubs across a snow covered tundra in Northern Canada. The furry mother leads the cubs past some rocks which poke from under the snow.

Arctic, Medium shot of a polar bear lying down lethargically on all fours.

Hudson Bay, Canada: Wide view of two polar bears walking along on icy tundra with an orange glowing sky in the background.

Arctic, Wide shot of a polar bear marches slowly towards the camera. Bear's white fur camouflages with a completely snow covered background.

Arctic, Wide shot of a polar bear plodding slowly across deep white snow.

Medium shot of a polar bear walking and foraging through white arctic snow.

Slow motion footage of two polar bears playfully wresting on frozen plain.

Slow motion footage of two polar bears playing on a frosty plain, they wrestle and bite each other playfully.

Knut, the famous Polar bear, drinking from a pond.

Aerial slow motion tracking shot of a polar bear running across snow covered pack ice.

Medium shot of a polar bear emerging from icy waters and shaking wet fur.

Medium shot of a polar bear trudging over white snowfields. Rocks and sea in background.

Medium shot of a male polar bear walking between snow covered boulders.

Panning shot of a furry white polar bear sleeping against another polar bear.

Medium shot of a polar bear sluggishly trudging through white snow.

Canada: Various long shots of two Polar Bears play fighting in the snow.

Medium shot of a polar bear negotiating deep snow and contoured terrain.

Wide shot of a polar bear crossing ice and diving into the water. Small ice bergs floating in background.

Knut, the famous Polar bear, looking around his enclosure.

Arctic, Wide shot of a polar bear scratching its back by rolling playfully in snow.

Knut, the famous Polar bear, running towards a plate of lettuce and eating from it.

Knut, the famous Polar bear, circling his head and looking around his enclosure.

Knut, the famous Polar bear, sitting on his hind legs and stretching.

Medium shot of a polar bear walking through untracked snow. Lifts head occasionally in a curious manner.

Medium shot of an adult polar bear slowly leading two cubs through water. Bears occasionally lifting heads towards the camera in a curious manner.

Svalbard, Norway: A polar bear feeds on a seal carcass on an icefloe. The snow and ice is red from the carcass' blood as the polar bear tears the flesh.

Knut, the famous Polar bear cub, licking a man's hand and using its paws to cling to the hand.

Canada: Wide shot of a solitary Polar Bear walking along in a tundra landscape.

Chukotka, Russia: Shots following a female polar bear with cub, swimming at the surface of the ocean with a mountain range in the background.

Medium shot of a polar bear crossing snow in front of the camera.

Knut, the famous Polar bear, eating from a plate of lettuce.

Canada, Hudson Bay. Wide shot of icy bay. Zoom in to polar bear lying on shards of broken ice. Polar bear stumbles walking along on cracked ice

Svalbard, Norway: A polar bear feeds on a seal carcass on icefloe, it looks up and appears to roar at the camera.

Camera follows person in protective clothing travelling on snowmobile (snow scooter or sled) from left to right along road in snowy landscape in the Arctic Circle in Canada

General view of small weather station building with large satellite dish and telegraph poles along horizon of snowy Arctic landscape, with bright almost starburst sun shining in sky and small ridges of snow in foreground

Close view of Arctic explorer Jim McNeill carrying out environmental tests at the Canadian Arctic - shows close view of McNeill's hands in protective clothing turning large hand drill then camera pans up to show his face

Arctic explorer McNeill pulling sledge along towards camera in the Arctic Circle in Canada, McNeill is using ski poles and wearing red overalls with brown furry hat and gloves

Norway: Various shots of Jostedals glacier showing snow and ice at the glacier outlet where it meets the sea

A white seal pup lays on snow and turns to face the camera, its black eyes and nose contrasting against the whiteness of its fur and surrounding snow.

Close view of large hand drill in foreground spiralling downwards into ice (as part of global warming test) against backdrop of snowy landscape with stationary boat in background

Airview of snowy mountainous landscape of the Arctic Circle in Canada with bluey pink hue

Back view of Arctic explorer Jim McNeill pulling sledge next to ITN reporter Lawrence Mcginty, they both walk away from camera across snowy landscape together

General view of a snowy landscape of the Arctic Circle in Canada on bright sunny day with an igloo snow house in the foreground

Greenland: Various shots of icebergs with a sunset in the distance

General view of Weather Station buildings and telegraph poles along distance on horizon in desolate snowy Arctic landscape as truck travels towards and past camera along road

Arctic: A team of arctic explorers ski away from the camera in a line. A starburst sun above casts its rays over the explorers as they ski to the boundless snowy scape.