Until fairly recently, most of the scientific research about parental influence on children usually left out dads. But recent studies have shown that fathers have an important role in the development of children-- from conception into adulthood. Award-winning science writer Paul Raeburn highlights all this new research in his book "Do Fathers Matter?" In today's podcast, Paul and I discuss what we can learn about fatherhood from a hunter-gatherer tribe in South America, how dads can help make their kids more social and verbose, and why every dad should roughhouse with their kids. If you're a dad or plan on being one someday, this is a must listen.