A spate of violent incidents in Colorado and Maryland raise copycat theories as a possible explanation.
Americans are notorious for their acceptance of violence, but their fear of sex in movies and TV. But two recent studies show the impact of both. And as Laci Green shows us, what they found is both interesting and a little concerning.
States with high gun ownership rates see higher rates of child-related gun injuries and deaths.
Two teachers are killed by students in less than one week. Why?
There's a lot out there about the impact of violent video games, but it turns out most of it isn't true. Games like "Grand Theft Auto" do change the way the brain works, but it's quite possibly for the better! Anthony explains.
One in six skulls recovered from a Neolithic site in Scandinavia reveals signs of everyday violence.