Ultimate Enemies: Revealed

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!!

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

This 20-minute DVD tour explores Muir Woods almost mystical forest with beautiful video, inspiring music and natural sound effects.

The Swamp Pride is on its knees. Its mighty male was killed by poachers, leaving three mothers and their cubs defenseless in one of the toughest landscapes for a lion in Africa. Busanga Swamp is a quagmire, even in the dry season. Hunting in shoulder-deep water is all but impossible, and deadly hippos and crocodiles patrol the ever-present waters. Keeping cubs alive here is hard work, but for these lionesses it just got even harder: two massive young male lions are hunting them down. The males want to claim the Swamp Pride and its territory as their own, but to take over a pride they must kill its cubs. The mothers must fight tooth and claw to make sure that doesn't happen

Exclusive two-disc film documenting the British and Irish Lions tour to South Africa in the summer of 1997. The unprecedented behind-the-scenes access to the team shows the preparations, the training, the fun, the team selection, the 'earthy' language, the bonding, the awesome task of playing and some shocking footage of injuries. Despite securing the series with wins in the first two tests, the Lions remained motivated by the prospect of a 3-0 whitewash, a feat never achieved against the Springboks throughout the century.

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.

A remarkable film from the National Geographic's daring EXPLORER series, ICELAND RIVER CHALLENGE follows twelve modern-day pioneers on a treacherous expedition down a remote Icelandic river. Crash through waterfalls and glide through sparkling glacial tunnels on this breathtaking journey. Using kayaks, inflatable rafts, and ultralight aircraft, the adventurers journey through the beauty and isolation of this dangerous waterway. Come explore a river that has, until now, defied exploration; witness the heart-stopping power of nature in all its glory with ICELAND RIVER CHALLENGE.

Le Lignon: a long building with two towers, below it the Rhone River and its forest, habitat to many birds. Two microcosms that influence and inspire each other. From their windows, the inhabitants watch the woods. What do they see? The film shows the human need for closeness to the animals that surround us, and the ambivalent relationship between humans and nature.