The first serious indications of the ecosystem impact of the Fukushima nuclear disaster in Japan are in, and they’re troubling. Researchers there collected 144 common pale grass blue butterflies from the region a couple of months after the catastrophic nuclear meltdowns leaked radiation into the environment last year. After studying them for a few generations, those researchers are finding signs of genetic mutations that are leading to physical abnormalities.
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.