Jonah was doing his math the other day and noticed something we all found amusing:

The front of the book, as viewed in profile, is obviously “paged through” and used, but is fairly clean. The bottom portion of the book is clearly unused. An in the middle? A very noticeable brown line. Those are the lessons he’s done since moving to Africa. Conclusion? Africa is dirtier than America! Other clues? My feet, which don’t get perfectly clean (especially on those stubborn callouses!), even with much strenuous scrubbing. And of course, the laundry–most especially the boys’ pants, all of which typically result in completely brown rinsing water when the day’s wash is done. (In case you missed it, see the related post, Clean is Relative.)