National Geographic : Quand Les Requins Attaquent

Trek into the hidden battlefields of northern Botswana where lions and spotted hyenas clash in overlapping territories. With never-before-seen footage, much of it filmed at night, you'll uncover an intense and vicious blood feud that has been waged for millennia. Follow the Southern Clan, led by a powerful hyena matriarch whose firstborn female cub kills her sister at birth to assure her succession as leader of the clan. Lurk in the shadows as a lioness from the Central Pride gives birth to three cubs and then encounters a deadly Egyptian cobra. You'll be stunned by breathtaking chase scenes as the hyena matriarch is brutally killed by a male lion, throwing the clan into chaos. Discover nature's savage conflicts in this ancient rivalry.

A look at the state of the global environment including visionary and practical solutions for restoring the planet's ecosystems. Featuring ongoing dialogues of experts from all over the world, including former Soviet Prime Minister Mikhail Gorbachev, renowned scientist Stephen Hawking, former head of the CIA R. James Woolse

With seven lionesses in their prime, 13 cubs between them, and two part-time magnificent males, the Bushbuck pride is large and in charge - and determined to make sure that their legacy lives on. But, through the years, adults, cubs and elders must continually adapt to the worsening dry seasons, while finding ways to hunt increasingly rare - or aggressive - prey. There is internal drama, too, so the ruling lionesses are forced to make difficult decisions in order to keep their dynasty alive

RHINO MAN follows the courageous field rangers who risk their lives every day to protect South Africa's rhinos from being poached to extinction.

Documentary following researchers as they try to take the first-ever picture of a black hole. They must travel the globe to build a revolutionary telescope that spans planet Earth.

In the northern hemisphere, snow is produced by atmospheric low pressure areas that move in from the western Atlantic in the form of huge cloud masses. Snow is vital to the balance of mountain ecosystems. Many animal and plant species at high altitudes depend on it for their survival. But due to global warming, snow is falling less and less. Will there be no more snow in the future? In the Alps and eastern US the situation is clear: as temperatures rise, snow falls less and less, and snow periods tend to shorten. This threatens the mountain flora and fauna. What future do the marmots or alpine bells have without a heat-insulating layer of snow? What future do the marmots or alpine bells have without a heat-insulating layer of snow? What will happen to the conifers in North America without the annual frost protection? Research teams are looking at the implications for snow-adapted species. The documentation shows animal mountain dwellers, who hope for the long-awaited snow every winter.

An Otter Study is a 1912 British short black-and-white silent documentary film, produced by Kineto, featuring an otter in its natural habitat, including groundbreaking footage of underwater hunting scenes. The film provided a novel treatment of the creature, which had previously appeared on film only as the victim of hunt films, with the unique underwater footage, shot by a cameraman behind glass in a tank concealed on the bed of the river in the opening scene, and a concluding scene, excised from the surviving print, in which it escapes the hunters. It was long thought lost until footage from a 1920s Visual Education re-release of the film, re-edited under the supervision of Professor J Arthur Thomson of Aberdeen University's Natural History Department, was rediscovered.