Christopher Columbus is going to have a big poster of Marco Polo up in his bedroom, and that's going to motivate him to go want to find faster routes to the East. Of course, he's going to go the wrong way and bump into the Bahamas, but the big idea here is that Europe really thought they were the only ones in town, and this has shown them that there's another town, and that's going to motivate them to want to change and to adopt some of these customs. It's going to lead, in a sense, to the Renaissance. It's the end of the Middle Ages. Marco Polo represents change. So we hope that you got the big idea. There's a million other things that you can learn.