But what if a robot, after a long dinner party, could bus the table and head to the sink? Now there's a relationship we can build on. Japan's HRP-2 humanoid 'bot, pictured here, has learned to do just that.
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.