The Japanese probe Hayabusa’s first peaceful journey to an asteroid was so successful in returning samples of the asteroid Itokowa to Earth that JAXA, the Japanese space agency, is planning a second Hayabusa mission. But Hayabusa 2 won’t come in peace. The second asteroid probe will pack an impactor that detonates an explosive on the asteroid’s surface.
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.