Thanks to HowStuffWorks.com staff writer (extraordinaire) Molly Edmunds for pointing me in the direction of this cool article from Live Science. Researchers at DePauw University in Indiana did a little study that examined the smiles of college yearbook photos to see if there was any correlation to later success in marriage. Turns out that it may an indicator.
Smiles were based on a scale of one to 10, one being a not very smiley person and 10 being off the charts happy. They found that not one of the top 10 percent of smiley folks was divorced. Nearly one in four of the bottom 10 percent had suffered through at least one divorce. They went a step further and collected photos from people over the age of 65 and rated their smiles as well. In this group, 11 percent of the top smiles had gone through a divorce, compared to 31 percent in the bottom lot.