Ever heard a school bus called a school hack? Grant and Martha explain the etymology of hack, beginning with hackney horses in England, then referring to the drivers of the horse-drawn carriages, then the carriages themselves, and finally the automobiles that replaced them. A museum in Richmond, Indiana, has a vintage yellow school hack, once used in the 19th and early 20th centuries to bring rural children to their schoolhouse. Incidentally, the contemporary term hack, meaning a tired old journalist, comes directly from the original term for the tired old horse. A bit about school bus history. This is part of a complete episode.