Today, in a thoroughly nerdy ceremony in Miami, the last five blocks of IPv4 addresses were handed out. That's sparked a lot of concern: The internet as we know it is out of space! The next evolution of Internet Protocol, IPv6, is largely unusable! Panic in the virtual streets! But that's all a bit misleading, at least for now. Here's what's really going on.
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.