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This astounding documentary delves into the mysteries of the Tunguska event – one of the largest cosmic disasters in the history of civilisation. At 7.15 am, on 30th June 1908, a giant fireball, as bright the sun, exploded in the sky over Tunguska in central Siberia. Its force was equivalent to twenty million tonnes of TNT, and a thousand times greater than that of the atomic bomb dropped on Hiroshima in 1945. An estimated sixty million trees were felled over an area of over two thousand square kilometres - an area over half the size of Rhode Island. If the explosion had occurred over London or Paris, hundreds of thousands of people would have been killed.

Go to the Big Island and hover above erupting craters at Hawaii Volcanoes National Park, watch flowing orange lava ooze across charred rock and steam billow from the Pu'u 'O'o Vent. Glide over Maui's Haleakala National Park and discover the diversity of Hawaiian landscapes. Island hop to Lanai for spectacular beaches. Visit Pearl Harbor from above and the memorial sites before exploring the rest of Oahu. Narrated by Tom Skerritt

A documentary of insect life in meadows and ponds, using incredible close-ups, slow motion, and time-lapse photography. It includes bees collecting nectar, ladybugs eating mites, snails mating, spiders wrapping their catch, a scarab beetle relentlessly pushing its ball of dung uphill, endless lines of caterpillars, an underwater spider creating an air bubble to live in, and a mosquito hatching.

Hop on a high-speed endurance adventure through one of the harshest environments on Earth. Glyn Maude follows a family of brown hyenas in Botswana's desolate saltpans of the Makgadikgadi.

This film uncovers the intriguing mystery of the return of the African rhino. In the 1800s there were more than 500,000 white and black rhinos in Africa. But by the 1990s, ivory poaching had left less than 7,000 animals alive. Remarkably, today their numbers have risen to 11,000. But there is now a new, deadly threat. Charging Back starts at the Pilansberg Game Reserve, where mysterious, unseen assailants were killing rhinos. Poachers could not be blamed, as the horns remained intact. Unexpectedly, the perpetrators prove to be relocated adolescent elephants, orphaned in culls. Lack of family structure has turned them into aggressive delinquents - a problem which conservation authorities now address by importing the steadying influence of older bulls. In astonishing scenes, the attackers are captured red-handed. Without the least provocation, elephants launch vicious assaults on unsuspecting rhinos.

Life is a challenge for a young seal in the untamed waters off the southern tip of Africa. Every day is a struggle for survival, whether he's avoiding aggressive seal bulls or escaping a great white shark. This is the story of a courageous little seal who braves the ocean and its perils, and leaves his colony, to follow one of the greatest migrations on Earth - the Sardine Run.

What do we know about these tiny animals that touch us so much? This film presents the life and development of young animals and their entry into adulthood through a world full of adventures, discoveries, trials and above all games. Follow these baby animals from birth as they play and explore the world.

Documentary which follows crocodile expert Brad Bestelink on a quest to dive with crocodiles without a cage or any other protection.

Nature cinematography combined with Panu Aaltio's music.

Sir David Attenborough narrates a documentary about the Kea, the world's only alpine parrot. Playful and destructive, it attacks cars, starts landslides and terrorises New Zealand ski resorts but behind the bad behaviour there's a sharp mind at work. David tries to play chess with a kea and discovers how its cheeky character is the key to its survival.