Africa s might and grandeur is formidable. Here, two powerful empires co-exist, one of land and one of the water realm. For most of the year these two entities work peaceably side by side, but in the dry season the rules change. The dry season is predator prime-time. The shore of the Luangwa River, Zambia, is the boundary between kingdoms and during this time, the battle begins. It s risky business for a lion to go up against a crocodile. But here, it s the ultimate conflict. Some of nature s most powerful jaws lock in confrontation as the world s fiercest predators battle for supremacy.

Follow scientist and engineer Tim Samaras as risks his life in the name of research, traveling through Tornado Alley during the 2008 tornado season -- one of deadliest in history. With more than 30 years of experience in disaster analysis and his expertise in designing tornado technology, Samaras hopes to gather never-before-collected data from inside and outside of the tornado. His goal: to design a new computer model that predicts tornados faster than ever before.

Delve into the lives of those haunted by addiction. Meet a 15-year-old South Korean boy in rehab because he's hooked on video games. It's an addiction shared by millions of Koreans, even spurring the government to intervene with a specialized rehab facility. In California, a woman is addicted to anonymous sex meeting countless partners in parking lots to satisfy her insatiable appetite.

Cannibal Island: It may seem like the stuff of horror movies and history books but, in the deepest jungles of Papua New Guinea, Cannibal Island shows that cannibalism is more than just a slice of gruesome folklore. Eager to separate fact from fiction, British writer and explorer, Piers Gibbon ventures into some of the remotest areas of this hugely diverse nation, where he comes face to face with an array of remarkable individuals. With no electricity or running water and a three day trek to the nearest telephone, the traditional tribal way of life has remained largely untouched - but the big question is, has cannibalism made it into the 21st century? In his search for an answer, Piers finds himself chatting with locals who are surprisingly candid about their cannibal past. With no apparent taboo over the issue, he is able to gather first-hand accounts of the killing and eating of fellow human beings suspected of being witches. Piers also encounters an ageing missionary who has lived among the villagers for nearly 40 years, and can recall a time when cannibalism was commonplace. But does it still go on today?

In every city, there are hoarders. A Florida woman shares her house with nearly 400 pigs, as they continue to multiply. In Pennsylvania, a man s obsession with vinyl records has driven him to collect around two million records, with thousands more purchased every month. In England, we meet a male hoarder whose apartment is filled with clutter piled three feet high, and a female hoarder forced out of her home due to her inability to throw items away.

Love behind bars with some of the most dangerous criminals on earth. In Texas, an inmate in solitary confinement gets married with the help of a radio host as surrogate groom, while the prisoner listens over the radio. In California, a pregnant woman has a white wedding at the county jail, with a glass wall separating the couple as they say their vows. In Tennessee, a man serving life for murder marries a woman he met over the Internet, but the marriage has little hope of being consummated.

This captivating six-part series features the Costa Serena, one of Europe s largest cruise ships. Longer than London Bridge and with entertainment areas covering more space than 20 football pitches, her 1,000-strong crew are pushed to the max keeping some 3,800 passengers in check. Follow all the action at sea as Italian Captain Russo and his crew cope with the onslaught of bad weather, demanding guests, wacky entertainers and medical emergencies. Expect tango, tempers, brawls and birthdays - this is the inside story of cruise ship life.

In fact only two of the four accounts of the life of Christ in the New Testament, the Gospel of Luke and the Gospel of Matthew, tell of his birth. These Infancy Gospels, as they are known, both agree that Jesus was born in Bethlehem and today pilgrims and tourists mill in their thousands around the Church of the Nativity built upon the supposed site of Christ s entry into the world, just as they have for centuries. But only Luke mentions the Census and the journey from Nazareth. Neither mentions the ox or the ass. The visitors from the east are nowhere referred to as Kings and nor is it mentioned that there are three of them. Both Gospels mention King Herod, but his dates do not correspond with the dates of a possible Roman census under the Governor Quirinus mentioned in Luke, which came ten years after Herod the Great s death.

This programme analyzes the very latest neurological research into Shell Shock and trauma, it retraces Hitler s time as a frontline soldier, and examines the medical history of Hitler s gas poisoning and his period at a psychiatric wartime hospital that the Nazi Party later tried to cover-up; and it explores an American top-secret report from 1943 to discover how Hitler s war experiences led to him suffering what some historians believe to be an extreme psychological disorder, Hysterical Blindness, known today as Conversion Disorder.

We reveal that despite the book suggesting he spent 20 years in the court of the Chinese emperor, there is no mention of Marco in Chinese records. Marco Polo s last will and testament remains unsigned and even the inventory of his possessions made on his death has question marks hanging over it. Our experts examine all the best evidence. Did Marco Polo, or any European, travel so far into China so long ago? Are the famous tales really based on Marco Polo s travels? And did a man named Marco Polo even exist?