Your smile can predict the length of your life.Curt Gunther/Keystone/Getty Images
Here’s a good reason to get happy: A 2010 study of photographs of 150 Major League Baseball players from the 1952 season correlated the strength of their smile with the length of their life. Those who were deemed to have Duchenne (genuine, full-faced) smiles lived on average for 80 years. Those with only partial smiles lived until about age 75. And those who were missing a grin only made it to age 72. Of course the smile itself doesn’t cause longevity, Psychology Today notes, but they are likely indicative of how these men lived their lives.
Will you get divorced? Your yearbook photo may hold a clue.Getty Images
Forget premarital counseling: Why not check out your would-be spouse’s yearbook photos before you tie the knot? After DePauw University researchers analyzed the grins of hundreds of graduates in multiple years of yearbook photos, they found that the top 10 percent of smilers had a divorce rate of about one in 20. Those in the bottom 10 percent, however, were five times as likely to get divorced. “Smilers tend to be happier, more social, and more emotionally stable, all traits that lead to successful relationships,” according to Psychology Today. Further, “smiling makes others smile, leading to mutually contagious and beneficial social arrangements.”