This is a repeat, but of a subject I find particularly fascinating, and certainly worth a second look. Or, if you missed it before, a first. In central China, a massive underground mausoleum housed a collection of life-size terracotta warriors – a sculpted army, amassed to protect China’s first emperor, Qin Shi Huang Di. But from what? And how? And how were these sculptures shaped and manufactured in the first place? Check local listings.