The Antikythera Mechanism: Greek for "Wicked Awesome!"

Put down your abacus and check this out:

LONDON, England (Reuters) -- An ancient astronomical calculator made at the end of the 2nd century BC was amazingly accurate and more complex than any instrument for the next 1,000 years, scientists said on Wednesday.

The Antikythera Mechanism is the earliest known device to contain an intricate set of gear wheels. It was retrieved from a shipwreck off the Greek island of Antikythera in 1901 but until now what it was used for has been a mystery.

Although the remains are fragmented in 82 brass pieces, scientists from Britain, Greece and the United States have reconstructed a model of it using high-resolution X-ray tomography. . . .

The calculator could add, multiply, divide and subtract. It was also able to align the number of lunar months with years and display where the sun and the moon were in the zodiac.