Join an aerial odyssey across Australia's iconic landmarks of Uluru, the Great Barrier Reef, and Lake Eyre as we reveal how these unique environments affect the creatures who call them home.

A powerful new documentary takes a fresh look at the space shuttle Challenger explosion, a tragedy that is still seared into the minds of a generation 30 years after the smoke cleared.

The Caribbean has been shaped by millions of years of unstoppable volcanic forces and ferocious hurricanes, creating a network of 7,000 islands, each one more unique than the next. From islets only a few miles long to landmasses with towering peaks, the habitats of this tropical paradise range from lush rainforests hiding untold species to multi-coloured coral reefs teeming with marine life. The fauna of the Caribbean has had to adapt to an island existence, becoming either generalists or specialists…creatures as old as the dinosaurs nest on its beaches, opportunistic scavengers patrol its skies, iridescent dynamos forage in its forests and wandering ocean leviathans give birth in its warm waters.

Explore the stark landscape, frigid sea and wild animals in Franz Josef Land, one of the most remote and inhospitable places on Earth. National Geographic Pristine Seas Explorer-in-Residence Enric Sala leads a group of scientists and adventurers on the first international scientific expedition to Franz Josef Land. His team will work with some of Russia’s most formidable biologists, geomorphologists and ornithologists to see how climate change is affecting this untouched world.

The longest-running documentary series in cable television history, honored with nearly 60 Emmys and hundreds of other awards, is celebrating a quarter-century on the air. Hosted by NGC correspondent Lisa Ling, Explorer: 25 Years provides an overview of how the series has covered our changing world, including the first look at the wreckage of the legendary Titanic and the rediscovery of the Afghan woman whose green eyes captivated the world from the cover of National Geographic magazine.

SEA MONSTERS: THE DEFINITIVE GUIDE explores the most (in)famous legends of the ocean using the latest scientific technology and deep sea submersibles. During the hour-long special, viewers join the world’s leading experts as they investigate the myths and the truths behind these extraordinary creatures.

In more than two years as head of the Roman Catholic Church, Francis has not shied from expressing his views on a great variety of issues.

Host Danny Trejo sets out to discover the origin of the idea of hell.

Our planet is home to thousands of spine-tingling spiders that come equipped with strange features and bizarre behaviors. Over millions of years spiders have dominated almost every habitat on Earth – from the jumpers and hunters to the engineers and dancers, we delve into the world of Incredible Spiders.

The team of experts that looked at the historic symptoms of the Tudor king are: historian, Lucy Worsley, Henry historian, Robert Hutchinson and medical doctor, Dr. Catherine Hood.

America has more prisoners behind bars than any other country on Earth. It now has 25 percent of the world's incarcerated, amounting to five percent of the total population; it's an entire nation behind bars. But today, that nation is in crisis. Increasing violence, extreme crowding, rampant drug use and gang warfare are all part of daily life behind bars. And every day it gets a little worse. Go deep into the heart of America's troubled prison system, navigating this world with the inmates who struggle to survive incarceration, the officers responsible for controlling and protecting them and the experts trying to solve the crisis of a prison nation.

Pope vs. Hitler is a thrilling two-hour docudrama special that explores one of the least known stories of World War II – the role of the Vatican in the conspiracy to assassinate Adolf Hitler. By the time the Nazis invaded Poland in September 1939, Hitler and the new Pope Pius XII – formerly Cardinal Eugenio Pacelli – had been at odds for the better part of a decade. Hitler’s crackdown on the Catholic Church inside Germany – including the persecution of priests, destruction of churches and closure of Catholic schools – had incensed the Vatican, and prompted Cardinal Pacelli to create a network of secret Church couriers within Germany to relay intelligence about Nazi atrocities to the Holy See. Among its couriers was Josef Muller – a gregarious Bavarian lawyer who would become the Vatican’s top German spy – and almost die for the cause. Meanwhile, a group of high-ranking German officers were growing increasingly concerned about their supreme commander. When Hitler instructed them to invade Poland and ruthlessly execute its intellectual leaders – especially priests – a conspiracy against him began to take shape. In early 1940 – with Josef Muller acting as his go-between – Pius feverishly brokered negotiations between rebels in the German military and the British government, effectively giving the rebels an Allied green-light to take out Hitler. Understanding his efforts may lead to murder, Pius found moral justification in the teachings of St. Thomas Aquinas, which endorsed the killing of tyrants in extreme circumstances. Pius believed the Nazis were a “satanic force” and counseled the conspirators to “change the regime and good things will happen.”

In honour of the 15th Anniversary of 9/11, National Geographic Channel is looking back at the very best reporting we have done since this world-changing tragedy first happened using extended excerpts from past specials that relate directly to events leading up to and following the attacks on New York City and Washington DC.

ON SEPTEMBER 11, 2001, one hundred and eighty-four innocent people lost their lives at the Pentagon. It is a fact that is fading from our collective memory. Today, its not uncommon to find people who dont know that the Pentagon was even a target - let alone the huge number of casualties. Though they helped define a generation, the individual acts of bravery and heroism that took place at the Pentagon are still relatively unknown. Even less widely known is that within an hour of the first attack, officials on the ground at the Pentagon received word that another hijacked flight was headed their way. For some evacuation was not an option. On the 15th Anniversary of the attack, survivors and first responders many for the first time share their raw and vivid recollections of the day that forever changed the world.

World War II left the greatest-ever number of ships and submarines hidden beneath the waves. Now, as the oceans drain, each vessel reveals its secrets through new data-based 3D reconstructions. From the Arizona in Pearl Harbor's shallows, whose destruction brought America into the war, to Nazi supership, the Bismarck, and its mysterious end three miles down; from the flaming merchant ships secretly torpedoed by U-boats off tourist beaches of the USA, to the covert inventions of the Allies' costly D-Day beachhead, and lastly to the troopship Leopoldville sunk with the needless deaths of 400 soldiers hushed up - Drain exposes the truth.

As the waters of the Amazon and its tributaries reach their lowest, torrential rain begins to beat down with brutal force. In a few months’ time, the forest will be submerged under almost thirty meters of water: enough to swallow up a ten-storey building! The youngest animals are dealing with the deluge for the first time in their lives. We follow them all: the sloth, terribly vulnerable; the opossum, the only marsupial outside Oceania; the harpy eagle, one of the greatest in the world; the shy, solitary armadillo; the squirrel monkey, a treetop acrobat… and many other inhabitants of a gleaming, transfigured world shown in this way for the first time.

Saddam Hussein was the fifth President of Iraq and one of the world's most brutal leaders of the 21st century. Behind the veneer of politics, his crimes against humanity echoed throughout the region. Whispers of his atrocities were heard across the globe. From prisoners to press, The Real Saddam Hussein opens the doors to the actions taken by the Iraqi President and how they ultimately led him to be captured, interrogated, and executed.

Killing Reagan explores the events surrounding the shocking assassination attempt on newly elected president Ronald Reagan by John Hinckley Jr., starring Tim Matheson as President Ronald Reagan and Cynthia Nixon as Nancy Reagan.

Before the Flood presents a riveting account of the dramatic changes now occurring around the world due to climate change, as well as the actions we as individuals and as a society can take to prevent catastrophic disruption of life on our planet. The film follows DiCaprio as he travels to five continents and the Arctic speaking to scientists, world leaders, activists and local residents to gain a deeper understanding of this complex issue and investigate concrete solutions to the most pressing environmental challenge of our time.

One of the most impressive and technologically advanced devices ever made, the Hubble Space Telescope has viewed objects never-before seen.