Everyone knows that expectant moms who smoke risk damaging their babies' physical health. New evidence from a Danish study shows that smoking can also harm babies emotionally. Patricia Brennan of Atlanta's Emory University has found that the more cigarettes a woman smokes in the third trimester of pregnancy, the more likely her children are to be arrested for a crime or hospitalized for substance abuse.
Of course, the study shows only a statistical association between maternal smoking and delinquency. Brennan concedes that other factors may have contributed to the children's problems. The study's subjects were born in a hospital located in a depressed part of Copenhagen, Denmark, so many of the mothers were relatively poor and might have been under stress that could have harmed their children.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.