The idea of using “tracked” roads dates back millennia. In the US and England, the first railroads employed not locomotives but horse-drawn wagons, which were used to haul minerals on the tracks. In 1829, locomotives were imported to the US from England, but they were found to be too heavy for the existing tracks. However, steam powered railroads soon grew to dominate the transportation of cargo. How did horses continue to be used by railroads after the advent of steam locomotives? Discuss