The last century has seen a remarkable boom in the fast-food industry, with a Mcdonald's, Pizza Hut, or Subway in every mall, on every corner, and even in gas stations and Wal-Marts! Since we seem to be unable to escape the grasp fast-food has on our stomachs, we could at least know something about where it comes from and what it is. This list will open your eyes to some interesting facts about major fast-food chains.