Discover how some of history's most intriguing mysteries have finally been solved in this fascinating documentary. Explore 50 notable puzzles, from the workings of the Antikythera Mechanism to Roman concrete formulas, the secrets of the Bermuda Triangle, and the mysterious fate of Anastasia Romanov. Learn about the groundbreaking discoveries that unraveled these long-standing enigmas and changed our understanding of history. This engaging countdown reveals the truth behind some of humanity's greatest mysteries.