Three mysterious objects are uncovered: The 3,000-year-old Berlin Gold Hat, believed to be a celestial calendar, has intricate symbols that represent the sun and moon. This would indicate a sophisticated understanding of astronomical cycles among Bronze Age people. A small black cube from an uncompleted Nazi nuclear reactor that Hitler tried to build, is made of pure uranium. Finally, we see the H1 clock, an incredibly accurate 18th-century marine chronometer designed to solve the problem of determining longitude at sea. Its innovative design paved the way for the development of modern navigation.