The Antikythera mechanism is an ancient mechanical computer designed to calculate astronomical positions. Its time of construction is now estimated between 150 and 100 BCE. The degree of mechanical sophistication is comparable to a 19th century Swiss clock. Technological artifacts of similar complexity and workmanship did not reappear until the 14th century,
The mechanism is the oldest known complex scientific calculator. It contains many gears, and is sometimes called the first known analog computer.
Humanity is fucking amazing.