Leonardo da Vinci is well known for his inventions as well as his art. But new evidence shows that many of his ideas were realized long before he sketched them out in his notebooks - some even 1,700 years before. Was Leonardo a copycat?

Explore some iconic historical moments while debunking long-held myths and shining new light on past events. Advances in investigative techniques, forensic science and historical scholarship offer new evidence on forgotten mysteries.