Many structures built by ancient Romans around 2,000 years ago are still standing, and some are still in excellent condition.
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The ancient Romans made stronger concrete than we do today — here's how
Ever wonder how 2000-year-old Roman structures stand the test of time?
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Over the last decade, researchers have come discover the Romans' secret concrete recipe that has maintained so many of its now-ancient buildings.
The most recent of these studies reveals that some ancient Roman structures are even stronger today than they were when they were built. Put simple, the Romans really knew their concrete.
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