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The Roman Concrete Revolution: How Opus Caementicium Changed the World
This episode dives into the forgotten marvel of Roman concrete — opus caementicium — and how its invention reshaped architecture, empire, and daily life. We trace its origins from the volcanic ash of Pozzuoli (pozzolana) to the magnificent dome of the Pantheon, still the world's largest unreinforced concrete dome after nearly 1,900 years. Lucas explains why Roman concrete actually gets stronger over time, unlike modern Portland cement, and how the recipe was lost after the fall of the Western Empire. Luna asks about the mysterious 'self-healing' properties discovered by modern…
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