North is north and south is south

There's a beautiful picture at Elaine's house that I always admire when I'm there. But, wait! Did you notice it too?? Yes, it's upside down! I had to ask, of course! Well, the answer is simple: Why is north called north and south called south? Anybody out there know?? So, let's make north be south and south be north! Can't get much simpler than that!