The Antikythera mechanism is an ancient over 2100 years old mechanical device most probably used to calculate the positions of the sun, moon, planets and the dates of the ancient Olympic Games. The mechanism was discovered in a shipwreck in Greece in the year 1900.
What is so remarkable about this device?
The complexity of the device does not correspond with history as we know it today. It uses a complex set of gears, dials and miniaturization only seen more then 1500 years later! The design and mechanics are of extraordinary detail and accuracy. This device is also known as the worlds first mechanical computer with a possible connection to Archimedes the Greek scientist. This leads to believe that the technology of the ancient Greeks was probably far more advanced than we ever realized.
Research on the Antikythera mechanism is still taking place.
Read more about this on Wikipedia: http://en.wikipedia.org/wiki/Antikythera_mechanism