General wide view of synchronised dance display, part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea, the backdrop shows sun rising from mountains

Wide shot of a flock of red-billed quelea flying in formation at dusk. A multi-coloured sky silhouettes birds in darkness as they fly.

A row of workers manually sorting letters at a post sorting office.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

The Milan Symphony Orchestra practicing in an ornately decorated church in Venice, Italy. The conductor conducts the orchestra with his baton.

Large shoal of fish swirling underwater viewed from below with sun shining through surface of water, fish constantly change direction

Close up of rows of children holding cards as part of display in Arirang celebrations in the May Day stadium in Pyongyang, North Korea, only the children's heads can be seen

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Slow motion black and white footage of Cambridge rowing team rowing on the River Thames dressed in white outfits in the 1930s. Water splashes as the blades of oars hit the water.

Large shoal of fish swirling underwater viewed from below with sun shining through surface of water, fish constantly change direction

Sea-level view of Air-Sea rescue Sea King helicopter hovering over turbulent sea, two people are hoisted down from helicopter into rescue dinghy boat as choppy waves lash against camera lens

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Kenya, Africa. Pan following a female cheetah chasing a Thomson's gazelle fawn at full speed across a grassy plain. The cheetah catches the gazelle fawn and walks away with it in its jaws.

A team of men rowing a boat along a river.

Red Arrow jets flying acrobatically in formation through blue skies. Jets release red, white and blue smoke.

Medium shot of bats swarming past a cave entrance and against a pale blue sky.

Hands of an unidentifiable man manually sorting letters at a post sorting office.

Legs and feet of Primary school children wearing summer school uniform, walking toward camera up slope together holding hands

Medium shot of men playing a polo game. Spectators on the sidelines watch on as competitors on horseback in their team uniforms hit ball with mallet.

Frankfurt, Germany: Interior of the Frankfurt Stock Exchange showing traders at work having a discussion across desks with large flat screen computers in front of them and a bottle of mineral water in the foreground.

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Mass of female dancers dressed in green, pink and yellow costumes dancing in rows in synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

Red Arrow jets flying acrobatically in formation through blue skies. Jets release red, white and blue smoke.

Cocos Island, Wide shot of a shoal of swimming under a reef arch. Fish glow in a vibrant pink as their scales reflect sunlight.

Kenya, Africa. A grazing Thomson's gazelle bolts as it becomes aware of a cheetah stalking it. Another gazelle enters the frame and the cheetah gives chase catching and asphyxiating the second gazelle.

Two male traders discuss the contents of a set of documents against a backdrop of computer screens on the trading floor of Barclays Capital (the investment trading division of Barclays Bank plc) in London, England.

A group of Tai Chi practitioners performing in unison using red folding fans in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Point of view shot from a travelling sleigh pulled by a team of husky dogs in an Arctic, snow covered valley.

Red Arrow jets flying acrobatically in formation through blue skies. Jets release red, white and blue smoke.

Red Arrow jets flying acrobatically in formation through blue skies. Jets release red, white and blue smoke.

Slow motion. Greenland, North America. A team of huskies pull a sleigh across a snow-covered surface. Dogs covered in thick fur, their mouths are open with their tongues hanging out as they pant for breath while running.

Two men look at a computer screen in a modern office environment. The men are casually dressed, one of them has long hair.

Two firefighters in protective clothing and helmets gripping and pulling large water hose slowly moving forward towards fire, firemen may be taking part in training exercise

A cricket team walks onto the pitch.

Ethiopia, Africa: Afar nomads trailing up a rocky path with their camels.

Rows of female dancers dressed in yellow with gold fans taking part in synchronised dance display as part of Arirang celebrations in Pyongyang, North Korea, backdrop is sun rising from mountains

Zoom out from three male traders in discussion to a wide view of traders working at computer terminals in a busy stock trading office in London, England.

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Kenya, Africa. Two large cheetah cubs chase a young male Thomson's gazelle. The gazelle cuts inside and changes direction in an attempt to allude the cheetahs before eventually being brought down.

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Sea of shining golden fans undulating held by dancers taking part in synchronised dance display as part of Arirang celebrations in Pyongyang, North Korea

Rows of coloured cards held up by small boys taking part in display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea, the children's heads peer over the cards then quickly change the cards to show a different colour

Thailand, Wide slow motion shot of bats all flying in the same direction against a blue sky and distant hills.

Painted Desert, Arizona, USA. Slow-motion, medium long-shot of an unidentifiable cowboy on horseback silhouetted against gold-tinted dust filled background twirling lasso. A dog runs across frame at foot of horse.

Rows of female dancers dressed in green carrying large pink feathers taking part in synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison using red folding fans in Longtan Park, Beijing, People's Republic of China.

Unidentified men using hammers while at work.