A mob of 500 out-of-control teens took over a Colorado shopping complex Sunday afternoon, erupting into fights, and damaging property. The unruly horde, a majority of whom were between the ages of 14 ...

In North Charleston, South Carolina, authorities say a brawl led to an officer being tackled and pummeled repeatedly during a July Fourth gathering. People say the 400-person crowd grew out of control ...

The story goes that these out-of-control teens are both extra sensitive to rewards and unable to rein in impulses— and thus naturally risky. They just can’t control themselves because their brains are ...