It was sunk with a wrecked ship in 80BC, found by divers in 1900 and until now has baffled scientists.More and here too.
The device is a complex arrangement of more than 30 bronze gears, wheels and dials, and is at least 1,000 years ahead of its time.
Now, after painstaking reconstruction, physicists say it could track astronomical movements with remarkable precision.
It was also able to follow the movements of the Moon and the Sun, predict eclipses and even recreate the irregular orbit of the Moon.
It may have predicted the positions of some of the planets. Lead researcher Prof Mike Edmunds, from Cardiff University, said: 'The design is beautiful, the astronomy is exactly right. The way the mechanics are designed makes your jaw drop. Whoever has done this has done it extremely well.'
The findings, published in Nature, suggest Greek technology was far more advanced than previously thought. No other civilisation created anything as complicated for another 1,000 years.
Other marvels from the past...
- A 14cm clay battery was found near the Iraqi capital Baghdad. It appears to be 2,000 years old
Thanks to Mr. Battle.
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