Getting a cardiac map of the electrical activity coursing through a live, beating heart has proven impossible until now. For the first time, researchers have monitored the pulsing hearts of living pigs in real time, by wrapping a flexible array of silicon-based sensors around the heart. This could lead to minimally invasive treatments of arrhythmic hearts with erratic beats.
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.