Add Yahoo as a preferred source to see more of our stories on Google. Ancient walls in Pompeii with volcano Vesuvius in the background. New research suggests builders used a heated quicklime-and-ash ...
Ancient Roman concrete is a global fascination. Remarkably, the Pantheon—Rome’s unreinforced concrete dome, dedicated in 128 A.D.—still stands to this day, and aqueducts from the same period continue ...
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