Stories of life and death unfold as teams of emergency doctors diagnose and treat patients. These specialists make critical, split-second decisions.

The Mona Lisa by Leonardo da Vinci is the most famous painting in the world. What is the secret behind the “real” Mona Lisa?

After the shocking murder of his mother-in-law Vibeke Rasmussen, filmmaker John MacGibbon picks up his camera and begins his search for truth.

Can engineering really compete against worsening natural disasters, like tornadoes? It's a vital, ongoing contest that humans must win to survive.

Four Navy SEAL veterans visit the site of the bloodiest day in U.S. Naval Special Warfare history and pay homage to the fallen soldiers of Normandy.

Upon his death 3000 years ago, at the age of 92, the great pharaoh Ramesses II was buried and began his ascension toward the afterlife.

The ocean has its big players: dolphins, sharks, manta rays, whales. The others are humble and discreet, often overlooked by the cameras – until now.

Diana was a shy girl everyone could relate to. The difference? She became Princess of Wales. Her legacy still echoes through Britain's royal family.

Stories of life and death unfold as teams of emergency doctors diagnose and treat patients. These specialists make critical, split-second decisions.