Piers Gibbon

National Geographic follows underwater explorer Bob Ballard as he searches for the aircraft carrier sunk during the Battle of Midway.

National Geographic joins author and explorer Piers Gibbon as he investigates one of mankind's ultimate taboos: cannibalism. Gibbon treks into the rain forest of Papua New Guinea to find tribe members who ate human flesh. And, meets the members of the once-feared Biami tribe to witness their ritual techniques.

Document some of the world's most ancient and extreme medical practices, from the snake-soup healer in Hong Kong to the chicken-massaging witch doctors in the African country of Cameroon. Gibbon is joined by volunteer patients who are seeking cures to their own ailments, something Western medicine has failed to achieve.