MarriageTweets

(CNN) — No one can truly know what goes on inside a marriage except the two people involved, but researchers are getting increasingly good glimpses at what makes couples tick, how relationships are stressed and what factors can keep the spark alive. || New long-term studies show how a baby, boredom affect couple || Study: Arrival of the first baby puts a sudden, important strain on a marriage. || Boredom has long-term implications on marriage, researchers find. || Study finds link between “smile intensity” in photos and chances of divorce. || Related: Meet experts live at the 2009 Smart Marriages Conference