The Antikythera mechanism is an ancient Greek device, believed to date back to around 150-100 BCE. Discovered in a shipwreck off the coast of Antikythera, it is considered the world's first analog computer. The mechanism consists of a complex system of gears and dials that were used to predict astronomical positions and eclipses, showcasing advanced engineering for its time. This remarkable artifact includes a series of bronze gears that work together to calculate the cycles of the Moon and Sun, as well as the timing of the Olympic Games. The Antikythera mechanism highlights the sophistication of ancient Greek technology and their understanding of celestial movements.