Even more amazing? Precision gears were not thought to be used before the 1600s.
The Antikythera Mechanism - how does 14th century technology exist in a 2,000 year old device? | Altered Dimensions ParanormalAltered Dimensions Paranormal
"Although we now know what the device did, we still do not know what the mechanism was used for. Detailed examination of the gears in the mechanism showed it was able to track astronomical movements with remarkable precision. The device is capable of following the movements of the moon through the Zodiac, predict eclipses, and even recreate the irregular orbit of the moon. Researchers now believe that it may also have predicted the positions of the planets (Greeks knew of five planets at the time)."
Recreated with plexiglass:
Here is what was found:
