1. The Antikythera Mechanism

Discovered in a shipwreck off the coast of Greece, the Antikythera Mechanism has stunned experts since its recovery. This intricate device, dating back over 2,000 years, could predict astronomical events with astonishing precision. Its gears and engineering rival those of clocks developed more than a millennium later, leaving historians amazed at the ancient Greeks’ technological prowess. The true extent of the knowledge required to construct it remains a profound mystery. Learn more from Smithsonian Magazine.