The Mystery of Roman Concrete: Why Has It Lasted 2,000 Years Longer Than Ours?
Two thousand years after bricklayers in tunics tamped mortar under Mediterranean sun, their arches, harbors, and domes still shrug off time. Meanwhile, the modern world spends staggering sums patching cracked bridges, leaky tunnels, and spalling seawalls long before their planned retirements. The puzzle is almost taunting: how did ancient builders, without steel or Portland ...
