HISTORY

Mexican archaeologist Sergio Gomez Chavez and his colleagues discover a tunnel at the Teotihuacán site that continues in a straight path, directly to the Pyramid of the Feathered Serpent which stands at the very center of the city.

The Aztecs reign over Mesoamerica as the last great culture before the Spanish conquest. As they venture south, a group of warriors finds Giant pyramids, the remains of an enormous ancient city completely abandoned. They call it "Teotihuacan," the City of the Gods. Who built ...

Follow a team of scientists exploring royal tombs beneath the ancient Mexican city of Teotihuacán. After decades of research, these imperial burial chambers may reveal clues about the long-lost Teotihuacán culture and its mysterious people.

See stills and images of individuals featured in Ultimate Tut.

The documentary answers the persisting questions surrounding Tutankhamun: who was he; how did he die; why was his tomb found intact; and what makes his mummy unique?

See stills and behind the scene images of Secrets of the Dead: Caveman Cold Case

Journey to Spain to investigate a double Neanderthal mystery.

See stills and images of individuals featured in Secrets of the Dead: Bugging Hitler's Soldiers

Take a look at performance enhancing drugs, testing practices, and the possible side effects and consequences of what has come to be known as "doping" within the international sporting community.

More than 500 ago, Michelangelo Buonarroti was the darling of the Catholic Church, commissioned to create many of its most important pieces. Historians have long wondered about the mysterious circumstances of his death — and now, art historian Antonio Forcellino believes he has pieced together ...