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. (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. The goal: To find out what keeps love alive and couples together.
