The oldest known analogue computer is over 2,000 years old. The bronze gears of the Antikythera mechanism predicted eclipses, and nothing as intricate was built again for more than a thousand years, until medieval astronomical clocks.

100 BC · 1901 · apart: 2001 years

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The event

• Antikythera mechanismc. 150 BC · Antikythera island. In 1901 sponge divers raised a lump of geared bronze from a Roman-era shipwreck. It was a Greek device of the 2nd century BC that computed planetary positions, eclipses and even the years of the Olympic Games. Nothing as complex reappeared until the 14th century.

1st century BC · 20th century

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