"Marriageology": Belinda Luscombe offers tips for a lasting marriage

A new book suggests science holds the key to a successful marriage. "Marriageology: The Art and Science of Staying Together" looks at what research reveals about how to build a strong and lasting relationship. According to a 2017 study, about 50% of American adults are married, and another research found roughly 40 to 50% of married couples in divorce. Author Belinda Luscombe joins “CBS This Morning” to discuss her research.