Robots can be much more helpful than people. We're not talking about Roxxxy or that 'bot that serves up kebabs, but a robot therapist developed at MIT that has improved upper body motor skills in chronic stroke survivors even if the stroke occurred years previously. And -- to address the concerns of the day -- it did so without significantly increasing health care costs, and could in fact drastically reduce the cost per patient in the future.
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.