Got a couple to start:1. US Dollar bills are made out of cotton and linen2. Dueling is legal in Paraguay as long as both parties are registered blood donors3. When the divorce rate goes up in the United States, toy makers report that the sale of toys also rise4. It is impossible to fold a piece of paper in half more than 7 times without unfolding in between folds5. Approximately 20% of Americans have a passport