Just thinking about eating your favorite foods can make you feel good. Now, scientists are unearthing surprising links between the foods you eat and behavior. We hear about the latest research. Food critic and Gourmet magazine editor-in-chief Ruth Reichl offers thoughts on comfort food. MIT researchers Richard Wurtman, MD and Judith Wurtman, PhD explain why low-carb diets might be making people crabby or even depressed. Dr. Joseph Hibbeln of the National Institutes of Health reveals new research that eating fish may reduce violence in society. Plus, a visit to one of New York's hottest new restaurants, "Public," which has won awards for a mood that compliments the food. Finally, Johns Hopkins anthropologist Dr. Sidney Mintz discusses the social role of food in cultures throughout the world. (This program pre-empts Good Food, which returns next week.)