In the year 79 a.d., August 24 began like any other day in the busy city of Pompeii (pahm-PAY). But in the afternoon, a mountain nearby started to rumble. Suddenly, a giant cloud of ash, stones, and toxic gases exploded into the sky.
The mountain in what is now southern Italy was actually a volcano called Mount Vesuvius. It had been dormant for so long that the 15,000 residents of Pompeii didn’t realize how destructive it could be. They would soon find out.
Within 24 hours, the city was swallowed by a deadly mixture of superhot gases, ash, and rocks. When the ash cooled, it hardened like concrete. Pompeii disappeared from the map, lost without a trace for centuries.
Fast-forward to 1748, when workers began to dig up the rediscovered ruins of Pompeii. For archaeologists, it has been like finding buried treasure. The excavation has slowly continued for more than 250 years—and it’s still providing new clues about Pompeii and its people.