This device would have allowed dental patients to administer painkilling gas to themselves while the dentists worked on their teeth. Patients needed only to squeeze the bulb to release a hefty dose of nitrous oxide from the cylinder attached to their heads. Multi-tasking for the win?
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.