New forensic technology helps researchers study Dr. David Livingstone's unpublished and long-lost field diary, which reveals he witnessed the brutal massacre of slaves by their traders. The writings in this diary suggest Livingstone was far different from the legend that surrounds him.

Where the Hanging Gardens of Babylon were located, what they looked like and how they were constructed.

Of the Seven Wonders of the Ancient World, the Hanging Garden of Babylon is the most elusive of these constructions of classical antiquity. While traces have been found of the Great Pyramid of Gaza, the Temple of Artemis at Ephesus, the Statue of Zeus at Olympia, the Mausoleum of Halicarnassus, the Colossus of Rhodes and the Lighthouse of Alexandria, centuries of digging have turned up nothing about the lost gardens of Babylon – until now.

Why, in the nearly 3,000 years since the gardens were presumably built, has no archeological evidence ever been found to support their existence? Is the Hanging Garden of Babylon a myth or a mystery to be solved?

Oxford academic Stephanie Dalley has decoded an ancient, long-overlooked text in the British Museum and now believes that the gardens were built by another man, in another time, in another location. She travels to war-torn northern Iraq to gather evidence to support her controversial new theory and try to solve this ancient mystery.