Research conducted by Dr. Hertenstein and his students found that people who smiled in college yearbook photos were less likely to be divorced later in life. Their work has received worldwide attention since it was published last spring in the journal Motivation and Emotion. Coverage began in British media outlets, and spread to United Press International, Yahoo! and a piece which aired April 16, 2009 on NBC's Today. The research was recently included in the New York Times Magazine's "Ninth Annual Year in Ideas" and was cited by India Today.