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Roman Concrete Secret: Why Ancient Harbors Are Getting Stronger

If you drop a block of modern standard concrete into the ocean, the salty seawater will slowly chew it apart. Within a few decades, chemical reactions erode the material, causing micro-cracks that eventually lead to catastrophic structural failure.Yet, two-thousand-year-old Roman piers, breakwaters, and harbor structures still stand completely intact across the Mediterranean coastline. Even more baffling to modern geologists and engineers: these…
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The Archaeologist broke the news on Monday, May 25, 2026.
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