Could the trauma of a terrorist attack change the genetic characteristics of one’s descendants? This program examines the emerging science of epigenetics, which studies biological heredity unrelated to DNA sequencing. With commentary from leading scientists in the field—including geneticist Marcus Pembrey, among the first to observe that dietary stress can produce health problems two generations later—the program explores a wide variety of clinical evidence for epigenetic inheritance. An experiment focusing on children born shortly after 9/11 evokes the new discipline’s powerful implications. A BBCW Production. (50 minutes)