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.

A dazzling journey through time via the remarkable images of National Geographic photographer Frans Lanting and his epic "LIFE" project, which presents a stunning interpretation of life on Earth, from the Big Bang through the present.

What happens when a world that relies on traffic and the logistics that allow it comes to a standstill? What happens when sickness and even death are taken from us?

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As the most dammed, dibbed, and diverted river in the world struggles to support thirty million people and the peace-keeping agreement known as the Colorado River Pact reaches its limits, WATERSHED introduces hope. Can we meet the needs of a growing population in the face of rising temperatures and lower rainfall in an already arid land? Can we find harmony amongst the competing interests of cities, agriculture, industry, recreation, wildlife, and indigenous communities with rights to the water? Sweeping through seven U.S. and two Mexican states, the Colorado River is a lifeline to expanding populations and booming urban centers that demand water for drinking, sanitation and energy generation. And with 70% of the rivers’ water supporting agriculture, the river already runs dry before it reaches its natural end at the Gulf of California. Unless action is taken, the river will continue its retreat – a potentially catastrophic scenario for the millions who depend on it.

The highest mountain range in the world, the Himalayan range is far reaching, spanning thousands of miles, and holds within it an exceptionally diverse ecology. Coniferous and subtropical forests, wetlands, and montane grasslands are as much a part of this world as the inhospitable, frozen mountaintops that tower above. The word Himalaya is Sanskrit for abode of snow, fitting for a stretch of land that houses the world’s largest non polar ice masses. Extensive glacial networks feed Asia's major rivers including the Ganges, Indus, and Brahmaputra. More than a billion people rely on these glacier-fed water sources for drinking water and agriculture. The Himalayas are not only a remarkable expanse of natural beauty. They're also crucial for our survival.

Pete the Pond has spent the last 20 years trying to return Britain's aquatic wildlife to its former glory. Despite his best efforts, the abundance of creatures he remembers from his childhood are quickly disappearing. As he sets out to build yet another wildlife pond in a British garden, a letter from his local council threatens to destroy his life's work.

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Werner Herzog's documentary film about the "Grizzly Man" Timothy Treadwell and what the thirteen summers in a National Park in Alaska were like in one man's attempt to protect the grizzly bears. The film is full of unique images and a look into the spirit of a man who sacrificed himself for nature.

Every year, thousands of Antarctica's emperor penguins make an astonishing journey to breed their young. They walk, marching day and night in single file 70 miles into the darkest, driest and coldest continent on Earth. This amazing, true-life tale is touched with humour and alive with thrills. Breathtaking photography captures the transcendent beauty and staggering drama of devoted parent penguins who, in the fierce polar winter, take turns guarding their egg and trekking to the ocean in search of food. Predators hunt them, storms lash them. But the safety of their adorable chicks makes it all worthwhile. So follow the leader... to adventure!!

A documentary on Al Gore's campaign to make the issue of global warming a recognized problem worldwide.

The primary defender of Israeli nature is virtually the only person breaking ground in the talks between Israelis, Palestinians and Jordanians. A religious scholar who lives in the territories, Professor Yossi Leshem is waging an uncompromising battle for coexistence between the parties with the aid of birds. Through a project that he initiated, barn owls are used as exterminators in the fields to prevent pollution of the groundwater for everyone. But Prof. Leshem dreams of implementing the project even further in the entire Middle East, enabling the birds of prey to survive instead of becoming extinct while simultaneously bringing together the divided peoples.

Following in the footsteps of Charles Darwin, Heinz Sielmann traveled to the bizarre volcanic islands of Galapagos. The multi-award-winning film shows the unique wildlife on the Pacific Noah's Ark.

The American Southwest is a feature length blue chip natural history film narrated by indigenous environmentalist Quannah Chasinghorse. The movie journeys down the mighty Colorado River, examining the astonishing beauty and biodiversity of the region, while confronting the environmental destruction from dams and the perilous fate of the river. The story is told through never-before-seen wildlife sequences such as beavers building wetlands, condors recovering from the brink, and the potential return of Jaguars to American soil. The film beautifully advocates for better management of the river and increased wildlife conservation efforts in the iconic landscapes of The American Southwest.

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The lives of Ruth, Philipp, and Anja are directly linked to coal. And so they are also directly affected by the debate surrounding the coal phase-out. They are concerned about their future, but from different perspectives and in different ways. The days of coal are numbered. A coal commission is currently working on a concept for phasing out coal that includes an end date for lignite mining and power generation while ensuring that the climate protection target for 2030 is achieved. Germany already generates almost 40 percent of its electricity needs from renewable energies.

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Hogwood: A Modern Horror Story takes you beyond the factory farm walls and follows an intrepid group of undercover investigators as they enter some of Britain's biggest factory farms for the very first time.

Although first glance reveals little more than stones and sand, the desert is alive. Witness moving rocks, spitting mud pots, gorgeous flowers and the never-ending battle for survival between desert creatures of every shape, size and description.

Ducks are true originals. There are more than 120 different species of ducks in all, a fantastical group of complex characters. Ducks have a talent for survival, and life stories filled with personality and charm. Each bird is more fun than the last, and will leave you wanting more.