Stories of siblings are everywhere in our culture from famous books like “Little Women” to some of the best known tales of the Bible. They provide morality tales and inform how we think about our own brothers and sisters. An estimated 80 percent of Americans have siblings, and whether those relationships are good, bad or somewhere in between, researchers and therapists say they are some of the most important and longest of our lives. But they are also little understood and often overlooked. Guest host Indira Lakshmanan and her panel of guests discuss what shapes adult sibling relationships.