Like many people, I’m hopelessly addicted to the History Channel. Barring the occasional hour on the story of tapioca, or putty, they do lots of interesting stuff, and last night it was ancient Chinese weaponry. Everything was going swimmingly until the program reached the invention of gunpowder. It showed a fellow mixing the stuff in a solid-silver (!) bowl, and we were informed that charcoal is the main ingredient, and there are two others.