Between 14 and 37 AD, during the reign of Roman emperor Tiberius Caesar, a glass maker invented vitrum flexible, or unbreakable glass, that was so advanced, we still don't understand it.

公元14至37年间， 罗马皇帝提比略·凯撒在位期间，一位玻璃制造商发明了vitrum flexible， 也就是牢不可破的玻璃， 它是如此先进， 我们仍然不明白。