National Geographic

In 1869, John Wesley Powell set out with a crew of nine down the uncharted Green and Colorado Rivers. The men struggled for survival throughout their adventure. Featuring spectacular footage of the Grand Canyon, the film uses the journals of Powell and two of his men to tell the tale of their historic voyage.

Auto theft, drug overdoses and even trespassing grizzly bears are all in a day's work when it comes to the calls Montana police respond to in the rugged land known as America's Final Frontier. With exclusive access, National Geographic rides with the police force as they rush to reach a severely-injured woman in remote mountainous terrain. Then, police suspect that an Iraqi war vet needs psychiatric evaluation instead of jail-time, and a man pulled over claims it's his constitutional right to...

For more than half of the U.S. population, the Appalachian Trail is less than a day's drive away. Yet despite its proximity to many major cities, few truly know the splendor of this national treasure. National Geographic travels off the beaten track to discover the remote and often unknown corners of the 5-million-step journey.

Diamonds: to the consumer they symbolize wealth, glamour and undying love. To the diamond hunter, the dealer, and the thief, they represent the potential to make a fortune. National Geographic takes an in-depth look at these international symbols of wealth and their connection to terrorism and crime. From the dark world of diamond smuggling, to the alleged 9/11 connection between al Qaeda and the Belgium diamond sector to the world's biggest diamond heist, Secret History of Diamonds reveals...

Joseph Mengele -- the escaped Nazi war criminal and SS physician known as the "Angel of Death" -- spent years doing bizarre medical experiments on twins at Auschwitz, working to determine if twins held the key to building a blonde-haired, blue-eyed master race for Adolf Hitler. Now a historian says he has evidence that Mengele's attempts may not have ended at Auschwitz and that his obsession to engineer an Aryan master race continued in South America. Deep in the Brazilian outback, a tiny town...

What could we do if we had evidence terrorists were close to acquiring nuclear weapons, or even making their own? How would we defend ourselves from a blast with fireballs hotter than the sun? Today, defiant nations desperately pursue them, while at home, agencies prepare for the worst. National Geographic races from motorcade to helicopter to confidential meeting, as scientists and intelligence experts reveal the hard facts about the world's most lethal weapons and the unbreakable physical...

The Burmese python, one of the largest, most powerful snakes in the world, has established a breeding population in Florida's Everglades and soon, the snakes will be poised to spread to other areas in the United States. How far will they get? Biologists are plotting a counteroffensive, even as they're still making discoveries about the basic biology of these massive serpents. The scientists waging this "python war" have one objective: to preserve the ecological balance of the Everglades. Can...

National Geographic joins a crew of world class anglers and scientists for a remarkable expedition to study the largest predatory fish on earth. Into the Unknown As the expedition continues deep into the SOFA, the shared offshore foraging area, the team has lost more than a third of the bait and haven't come close to catching a great white... yet. In the quest to land a big one, they discover two species of squid, which "the Doc" theorizes must be a good part of the sharks' diets. But their...

Nero is accused of having "fiddled while Rome burned" and remembered for executing his mother and burning Christians alive. History has sided against him on all counts, but could there be another side to ancient Rome's notorious emperor? National Geographic reveals how Nero rebuilt a city devoured by fire, revolutionizing Western architecture and forever changing the face of Rome.

Getting "high" can be an unquenchable desire one that impacts the human body of the first-time recreational user and severe addict alike. National Geographic goes beneath the skin to reveal how our bodies react to three common drugs: marijuana, cocaine and ecstasy. Drugged reveals just what the human body undergoes when drugs are introduced to its organs. Cutting-edge imaging techniques delve deep inside the lungs, heart, blood vessels and brain to give a unique inside-out perspective on its...

Discover the dangers and drama of getting the perfect shot in the wild, and witness how wildlife filmmakers have survived in some of the world's harshest environments. Go where each breath burns your lungs, stand between a river and millions of stampeding, thirst-crazed wildebeest, and get hit in the chest by man-eating tiger sharks. From helicopter crashes to leopard attacks, National Geographic reveals life behind the lens and the dangers involved in getting wildlife's award-winning shots....

National Geographic brings to life one of the greatest and most extreme natural history events never seen before -- a gigantic herd of dinosaurs escape the unforgiving North Pole.