On this episode of Talk Nerdy, Cara is joined by Kari Byron to talk about her new book, "Crash Test Girl: An Unlikely Experiment in Using the Scientific Method to Answer Life's Toughest Questions." They talk about her time on Mythbusters, the importance of the scientific method, and how her work on television is empowering her daughter and other young girls to be who they really are. Follow Kari: @KariByron.