Antikythera mechanical device has been dubbed as the first computer in the world. Found on a ship that sank in about the century of 80-50 BC. The box-shaped wood has decayed and the metal part is rusted.
Only recently have scientists finally found the goal: Antikythera is a navigation device. It is amazing that such sophisticated machines were created at the time. Other such mechanisms are only discovered a few millennia later.
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From @heryadii