Constructed of a wood-based polymer that can be injection-molded like plastic, the RKS maintains the tone and long-lasting sound of wood. The material also allows for the ax´s unprecedented â€neck-throughâ€ open design, which accommodates the series of resonating aluminum ribs that add layers to the sound. The result is a guitar with the bite of a solid-body electric and the fullness of a hollow-body. From $2,000
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.