The Great Buffalo Saga

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.

Join affable presenter Nigel Marven as he explores El Salvador, the volatile land of volcanoes with a colorful culture and natural history. Follow along as he climbs an active volcano near the capital San Salvador, comes face-to-face with a crocodile, cuddles a caecilian, fights fire with fire, dives deep into a volcanic lake, and discovers the Pompeii of Central America.

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.

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.

On a journey through the interior of the earth, we learn about the life and dreams of a swiss explorer who searches for caves and underground rivers in a sector marked by violence and armed conflict in Colombia. This underground labyrinth is a metaphor about a dark past, buried deep within the soul, where old war wounds heal with the infinite passage of time.

American Ocelot tells the story of one of the most endangered and beautiful wild cats in the United States — a species so elusive that high-quality images and video have never been captured until now. With fewer than 100 individuals remaining in the US, the ocelot is critically endangered, genetically isolated, and only exists in Texas.

There is not more merciless and sly hunter, than greater white shark. She is legally considered one of the most dangerous and blood-thirsty predators of world fauna. Not many there is a lucky enough victims to survive after the attack of large white shark.

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 place of biological superlatives with a flora and fauna that have only just begun to be researched: Lord Howe Island, between Australia and New Zealand. This is the first documentary on what may be the most isolated nature reserve on the planet.

Africa's giant rats – the size of a cat – can be trained to detect land-mines by smelling them. Giant rats are clever and they learn fast. Their sense of smell is better than a dog's, they have more stamina, and they're a lot cheaper to train. This documentary follows "Miss Marple", who was born in a training lab and who goes through a year's training before being sent on her first mission to Mozambique. A shorter version (43 minutes) screened at festivals in 2009 but was never widely released.