We learned last week that, to protect the games or possibly just freak us the hell out, some London residents will play host to rooftop missiles during the Olympics. Here's what that missile will look like: a Starstreak High Velocity Missile. Read more here.
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.