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Antikythera machine found in Greece
The Antikythera mechanism is an ancient analog computer designed to calculate astronomical positions. It was recovered in 1900–1901 from the Antikythera wreck, but its significance and complexity were not understood until a century later.
Jacques Cousteau visited the wreck in 1978 but, although he found new dating evidence, he did not find any additional remains of the Antikythera mechanism.
The construction has been dated to the early 1st century BC. Technological artifacts approaching its complexity and workmanship did not appear again until the 14th century AD, when mechanical astronomical clocks began to be built in Western Europe.
Antikythera x ray
The mechanism was housed in a wooden box approximately 340 × 180 × 90 mm in size and comprised 30 bronze gears (although more could have been lost). The largest gear, clearly visible in photo , was approximately 140 mm in diameter and probably had either 223 or 224 teeth. The mechanism’s remains were found as 82 separate fragments of which only seven contain any gears or significant inscriptions
