Que cachent les pyramides d'Égypte ?

Explores the Pyramids of Giza as Egyptologists try to unravel the mysteries and decipher the clues behind these stone giants built over 4,500 years ago.

Up to one million gladiators are thought to have died in arenas across the Roman Empire. And, although fascination with gladiators has been high, the details of their lives and deaths remain fragmentary. Now, with the discovery of an ancient Roman burial site containing 80 skeletons thought to be gladiator warriors, National Geographic recreates the world of the Roman arena and how six gladiators lived, fought and died.

It's the most extraordinary feat of engineering in history, and one of the most iconic man-made structures on the planet - the Great Wall of China, stretching thousands of miles across barren deserts and treacherous mountains before finally plunging into the sea. But why did the Chinese go to such staggering lengths to build it, and what are the secrets that have enabled it to survive for over 2,000 years? Now, ground breaking science is re-writing its complex history and de-coding its mysteries to reveal that there is much more to the Great Wall than just bricks and mortar. Cutting edge chemistry reveals that the secret to the Great Wall's remarkable strength is a simple ingredient found in every kitchen, and a new survey also determines that its length is truly amazing, as we finally solve the enigma at the heart of the world's greatest mega-structure.

Built in 1755 at the height of the French and Indian War, Braddock's Road was one of the nation's most infamous military roads. Traces of this historic route, in western Maryland, still remain, buried beneath soil and brush, and a team of archaeologists is on the hunt.

In the heart of a metropolitan city of 15 million people and among the construction of a new billion-dollar transportation network, an archaeological sensation has been discovered: the ancient harbour of Theodosious, lost from the history books for over 1000 years.

In northern Peru, the unprecedented archaeological discovery of the largest known mass child sacrifice in the world opens the doors to the kingdom of Chimor. This international archaeological investigation carried out like a criminal investigation reveals the mysteries of the last civilization of the Andes before the arrival of the Incas.

A study of the ruined Egyptian pyramid of the 4th dynasty pharaoh Djedefre, including evidence from a ten-year excavation which supports new theories about his reign and the pyramid's importance.

To outsiders, Turkmenistan is one of the world's least known countries. For the first time in ten years, a film crew has been free to visit spectacular excavation sites and follow international researchers into areas that have long been off-limits. Once considered the poorest part of the Soviet Union, oil and natural gas have brought new wealth to Turkmenistan today. A little known fact in the West is that 4,000 years ago, the country was home to one of the ancient world's centers of power. Although it flourished around the same time as the advanced civilizations of Mesopotamia and Egypt, the Margiana empire was later largely forgotten. Since the fall of the Soviet Union, the country has been slowly opening up to international researchers, and its astounding cultural heritage is coming to light.

Move over, King Tut: There's a new pharaoh on the scene. A team of top archaeologists and forensics experts revisits the story of Hatshepsut, the woman who snatched the throne dressed as a man and declared herself ruler. Despite her long and prosperous reign, her record was all but eradicated from Egyptian history in a mystery that has long puzzled scholars. But with the latest research effort captured in this program, history is about to change.

Huelva, Spain, an isolated region lost in time. The grass, the sand and the sky are the same that those foreigners saw in the spring of 1895, when they crossed the sea from a distant country to mark the unspoiled terrain and extract its wealth, when the tower was new, when people could climb to the top of the highest dune and imagine that the city of Tartessos was still there, in the distance, almost invisible in the morning brume.