Ancient Greek Inventions and Technology - Zapd - 1 views
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There is conflict on who invented it but it is known that the ancient Greeks did in fact use it to measure distance.
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The ancient Greeks discovered and used central heating in their more important temples. Flues (the small square holes seen in the picture) were put around the temple and circulated warm air from a fire somewhere else in the temple. After the fall of Ancient Greece central heating was mostly forgotten but was rediscovered in the industrial revolution.
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