Travel to Alaska's great wilderness, a place of incomparable beauty and power where you will witness close-up the amazing cycles of life in one of the last pristine corners of our planet Earth. Soar over Mt. McKinley, the tallest people in North America, crown jewel of the vast Alaska range, piercing clouds nearly four miles high. Explore the vibrant territory beneath this stunningly beautiful mountain. Watch caribou roam the plains, listen to the haunting howl of the wolf, witness the flight of the majestic golden eagle, meet a mother grizzly and her two cubs as they emerge from winter's hibernation. You'll be swept up in the drama and beauty of this unique wilderness and you'll enjoy for many years to come its unforgettable scenery.

Naturalists Charlie Russell and Maureen Enns film recently discovered grizzlies on Siberia's Kamchatka peninsula.

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.

We get to know a few inhabitants of central European rivers.

The largest predator on the planet, the sperm whale, is your host for an amazing exploration of the final frontier – the world at the bottom of the ocean. From the makers of the Walking With series comes this incredible marine tour, in which you'll witness a rarely seen world of hidden mountain ranges, majestic canyons, volcanoes and the beautiful and often deadly creatures that inhabit the deep sea.

Ocean Oasis is a fascinating journey into the bountiful seas and pristine deserts of two remarkably different, but inextricably linked worlds — Mexico's Sea of Cortés and the Baja California desert.

They are inspirational, playful, powerful, interesting and very intelligent animals, which have a magical bond with the people: Dolphins. You'll see these magnificent animals in their natural habitats - reefs in Eilat, the largest marine reserve in the world. And also be able to watch a dolphins dance and play with the camera, dive or just durachatsya. Never seen so close before!

In this special documentary that inspired a two-season television series, scientists and other experts speculate about what the Earth, animal life, and plant life might be like if, suddenly, humanity no longer existed, as well as the effect humanity's disappearance might have on the artificial aspects of civilization.

An astonishing journey revealing the awesome power of the natural world. Over the course of one single day, we track the sun from the highest mountains to the remotest islands to exotic jungles.

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In the depths of the Colombian jungle, the skeleton of an immense abandoned cement bridge is tucked away. It has turned into a delusional tourist attraction.

Mountain men Joseph R Walker was probably the first non-Indian to see Yosemite, in 1833, but not until the California militia entered the valley rounding up the Ahwahneechee Indians was the region discovered. In June, 1864, President Abraham Lincoln signed the Yosemite Grant, making it a California State Park. It became famous through the writings of Horace Greeley and the efforts of John Muir. Cinematographer Dennis Burkhart captures in this video the magnificence of Yosemite Valley (El Capitan, Bridalveil Fall, Half Dome), the High Sierra (John Muir Trail, Tuolumne Meadows, Tioga Pass) and the Mariposa Grove of giant sequoias. The camera catches the wildlife that roams the 1,1170 square miles of Yosemite, i.e. the mule deer, mountain lion, black bear, coyotes, bighorn sheep, and the rare peregrine falcon. This video reveals why 3.8 million visitors come each year and stand before awe-inspiring panoramas they will never forget.

Two thousand square miles, a mile deep, approximately 10 miles wide- no geological feature on earth evokes a wider spectrum of human emotions than does the Grand Canyon of Arizona. It is impossible not to be profoundly moved when confronting such immensity. But it is more than a chasm, it is alive with mule deer, mountain lions, coyotes, bighorn sheep, wild turkeys, blue grouse, blue heron, desert tortoises, and the rare kaibab squirrel, found only in the Grand Canyon. Long before the Spanish arrived, the Anasazi (Ancient Ones) lived here. Included is an exclusive segment, never before filmed, of Shaman's Gallery, a significant Anasazi find of rock paintings in the Grand Canyon area, dating between 2000 B.C., and A.D 1. Established in 1908, Theodore Roosevelt proclaimed the Grand Canyon a parkland and said "do nothing to mar its grandeur, keep it for your children, your children's children, and all who will come after you."

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A bear cub and a raccoon become fast friends when they're swept away down a river, away from their families.

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Steve Backshall visits a hedgehog rescue centre in Surrey founded by Brian May. He meets the dedicated staff and discovering the stories behind some of the animals being treated, helps to release a successfully treated hedgehog back into the wild, and offers advice on how to make a garden into a welcoming environment for the creatures.

"Without leaving his own garden, a man may know the world" - an abstract study of the wildlife found in every garden.

Drawing from never-before-seen footage that has been tucked away in the National Geographic archives, director Brett Morgen tells the story of Jane Goodall, a woman whose chimpanzee research revolutionized our understanding of the natural world.

In GHOSTS OF THE FOREST daredevil bird and wildlife cinematographer, John Young is embarking on a journey into the rainforest of the tropical north to find those creatures often heard but rarely, if ever, seen.