Story

The mummified crocodiles of Kom Ombo; using an X-ray on an ancient mummy; China's terra-cotta army; scientists solve a year-old murder using 15th-century forensics; virtual-reality techniques afford investigation of crucifixion.

Explorers use a sacred ancient Mayan temple code to search for an occult underworld engineered in Mexico; investigators in Britain discover the secret technology behind a life-size statue of Jesus Christ that came to life.

Ancient secret agents; fire beacons, horses and pigeons are used to transmit messages over thousands of miles; ancient spies use invisible ink made from human sperm and write messages inside raw eggs; Japanese ninjas use explosives.

Cutting-edge technology reveals exciting archaeological discoveries at the bottom of the ocean.

A discovery spotlights two limestone coffins that date back 3000 years.

A glimpse behind White House walls; surprising White House stories; secret tunnels and bunkers; where the president sleeps and works and how he is protected.

The hidden history of the White House, including the mystery of a top-secret construction project dubbed the Big Dig that took place outside the West Wing; the search for the truth utilizes images, graphics and previously classified materials.

Henry Rollins discusses why a very important office in Washington is oval; why a brothel once operated on the White House grounds.

An inside look at the Secret Service, a top-secret law enforcement agency made up of men and women who put their lives on the line to protect current and former U.S. leaders and their families; a special agent reveals the grueling selection process.

The real stories behind some presidential feats are revealed using everyday objects, such as eyeglasses, a wooden cane, and a coconut.

Presidents, sex and romance, and manners have influenced American English.

One of the world's most fortified buildings, the U.S. bullion depository at Fort Knox, Ky, has worldwide renown.

A glimpse behind White House walls; surprising White House stories; secret tunnels and bunkers; where the president sleeps and works and how he is protected.

The hidden history of the White House, including the mystery of a top-secret construction project dubbed the Big Dig that took place outside the West Wing; the search for the truth utilizes images, graphics and previously classified materials.

Henry Rollins discusses why a very important office in Washington is oval; why a brothel once operated on the White House grounds.

An inside look at the Secret Service, a top-secret law enforcement agency made up of men and women who put their lives on the line to protect current and former U.S. leaders and their families; a special agent reveals the grueling selection process.

The real stories behind some presidential feats are revealed using everyday objects, such as eyeglasses, a wooden cane, and a coconut.

Presidents, sex and romance, and manners have influenced American English.

One of the world's most fortified buildings, the U.S. bullion depository at Fort Knox, Ky, has worldwide renown.

A glimpse behind White House walls; surprising White House stories; secret tunnels and bunkers; where the president sleeps and works and how he is protected.