Everyone loves the beer-fetching Willow Garage PR2 robot, as seen in our recent gallery of its greatest achievements. Evidently, it even loves itself. When developers at Bosch Research gave it a pen, it drew a handsome self-portrait.
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.