The lost city of Machu Picchu is one of the greatest mysteries in archaeology. Scientists do not know why this city in the clouds was built, but investigations into secret Inca codes and deformed skeletons might finally reveal its ultimate mystery.

The Egyptian mega-temple at Karnak was once the political power base of the ancient pharaohs and the home to strange religious rituals; new discoveries of skeletons tell a story of jealousy, betrayal, and the rise of a new religion that changed Egypt.