As much as we love our silicon semiconductors, quantum computers are very much a technology of the future. Instead of the usual string of 1s and 0s, they'll be able to send both types of information at the same time, dwarfing their traditional counterparts. But one major problem is that they can only move through one optical fibre. To push more information through, they need a router, and Chinese physicists have unveiled the first one.
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.