9. Antikythera – The Ancient Greek Computer
Meet the oldest known computer! The Antikythera is a 2000-year-old ancient analog computer that was hand-powered. This amazing little device was crafted in Greece, and was used to predict the dates of astronomical events like solar and lunar eclipses decades before they would actually happen!
The entire device looks similar to a clock and was made up of a complex construction of gears with an outer casing. This device allowed ancient Greeks to track the movements of the sun and the moon, which is an outstanding feat for the times.