The Steadicam was originally developed to take the shake out of Hollywood chase scenes. Now a California company, Equipois, has given it a new purpose: to help line workers and file clerks. The x-Ar arm reimagines a Steadicam’s spring system to make arms and tools feel weightless, diminishing the risk of repetitive-stress injuries without motors, batteries or external power.
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.