Investigators at the University of Michigan's Institute for Social Research have unequivocally demonstrated that our parents often get on our nerves -- and we on theirs. "The parent-child relationship is one of the longest-lasting social ties human beings establish," said Kira Birditt, the study's lead. "This tie is often highly positive and supportive but it also commonly includes feelings of irritation, tension and ambivalence."
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.