The once-thriving Roman city of Pompeii resembles an eerie time capsule, seemingly unoccupied since a catastrophic volcanic eruption in AD 79, with the remains of its inhabitants forever frozen under a blanket of ash. But a closer look may reveal another ...

Roughly fifteen to twenty-five percent of Pompeii remains unexcavated even after two and a half centuries of digging, a startling figure for a site so thoroughly associated in the public imagination with total exposure.