The Roman emperor Vespasian began construction of the Colosseum in AD 72. It was finished in AD 80, the year after he died. The huge amphitheater included an elevator that could lift elephants to the floor of the arena.… Read More
Up to a quarter of women who gave birth in hospitals in Europe and America in the 17th through the 19th centuries died of puerperal fever. It's an infection that could most likely have been prevented by doctors and nurses washing their hands.