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7.3K views · 63 reactions | The Unbreakable Secret of Roman Concrete. We explore the incredible durability of Roman concrete and how they used volcanic ash to create a building material that actually gets stronger over time, unlike modern concrete. We discuss how this remarkable engineering knowledge was mysteriously lost to history. #historyfacts #AncientEngineering #RomanConcrete #AncientTechnology #ScienceMystery | Rare Viral Facts | Facebook
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