The death of Genghis Khan is shrouded in mystery. Legends say he was buried in an unmarked grave, and that anyone who knew the location of his grave was killed to keep it a secret.

Hundreds of years ago, a small group of Polynesians rowed their wooden outrigger canoes across vast stretches of open sea, navigating by the evening stars and the day's ocean swells. When and why these people left their native land remains a mystery.