This Toshiba scanner, just demonstrated in Japan, knows what vegetables look like -- just hold up your daikon or mizuna to the camera at the cash register, and it tots up the item. No need for stickers on your food, no need to consult a human, no need to even know what kind of onions you're buying. This is 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.