01:17
Violent Behavior and Gender
Dean Hamer, Director of the Gene Structure and Regulation Unit at the National Cancer Institute, talks about the disparity in the number of violent acts committed by men as compared to women. While he recognizes that there may well be social phenome...
02:58
Behind Closed Doors: Environmental and Genetic Links to Violent Behavior
Both the environment in which a child matures and his or her genetic nature contribute to aggressive behavior. Researchers studying a family in which male siblings all committed violent criminal acts found that the brothers shared a certain gene abn...