Along with its many other innovations, the Roman Empire revolutionized architecture with never-before-seen features, such as large-scale arches and dome roofs. And many of these structures still stand today despite being more than 2,000 years old.
None of it would have been possible without the Romans’ infallible building material: self-healing concrete. Now, an ancient construction site has revealed the recipe for creating this sturdy foundation.
At the time Mount Vesuvius erupted in AD 79, covering Pompeii in as much as 6 meters (19.7 feet) of volcanic ash, construction workers were in the