Why does stress turn some people into lifelong boozers, while others can gut it out with no lasting harm? Researchers at Munich's Max Planck Institute of Psychiatry studied this question by testing mutant mice that couldn't handle stress well. The answer, they now say, may lie in our genes.
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.