La historia secreta de las momias: Las momias guanches

In Morocco, new excavations on the site of Jebel Irhoud upset the generally accepted view of the dating of the appearance of man.

Thousands of terracotta warriors guarded the first Chinese emperor's tomb. This is their story, told through archeological evidence and reenactments.

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.

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.

Join a team of archaeologists and the Discovery Channel in an investigation into the mysterious lines of the Nazca region in Peru. Created by the Nazcas, these huge sculptures are only visible from the sky and depict people, animal, geometric forms, and strange creatures. See a premier exhibition of pottery and textiles, musical instruments, and mummies from this long-forgotten, pre-Columbian civilization and visit Cahuachi, a buried city of pyramids and ceremonial buildings which may have once been the religious capital of the Nazca people.

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.