The Antikythera Mechanism, oldest known calculator, is even older than first thought.
It was found in 1900 as part of a shipwreck off the Greek island of Antikythera. The technological complexity of this device, which is believed to have charted moving planets, marked the passing of days and years, and also may have predicted eclipses, was designed ahead of any other similar invention by more than 1000 years.
Argentinian researchers have corrected the original creation date of 100 to 150 BC, determined by radiocarbon dating analysis, to an earlier date of 205 BC. , since discovering an eclipse prediction calendar dial on the back of the mechanism that predicted a May 12, 205 B.C. solar eclipse.
