Slower development of the area of the brain that governs judgment makes males--especially adolescent -- -more likely than girls to die in accidents. According to a National Safety Council statistics, males were involved in 82 percent of accidental deaths associated with firearms, 87 percent of bicycle-related fatalities, nearly double the number of poisoning deaths, and almost four times as many homicides in 2004. Likewise, in 2006 they were in 81 percent of fatal crashes involving drunken driving. (AP Photo/Joerg Mitter)