A new maser that can work at room temperature and without any powerful magnets could usher in a new age of masing instead of lasing. It may be good timing, as the next generation of lasers could be the most powerful lasers to ever lase. Now this new device could be the simplest maser to ever mase.
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.