Feeling a bit obsessive-compulsive? New research suggests maybe it's not all in your head after all. More likely, researchers say, it's in your bones. A Nobel laureate at the University of Utah claims he has cured an OCD-like behavior in mice by giving them bone marrow transplants.
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.