This week, hosts Mark Masselli and Margaret Flinter speak with award-winning New York Times science writer and columnist Carl Zimmer on his critically acclaimed book, "She Has Her Mother's Laugh: The Powers, Perversions and Potentials of Heredity" on the dramatic scientific discovery underway fueled by genomics. He discusses the genome's role in understanding heredity and how personalized medicine will be advanced once the science and medical communities master their knowledge of how genomics impact health and disease.