By Gerald F. Koepplinger
Posted 03.16.2009 at 2:04 pm 7 Comments
July 1947: "Warplane wing tanks, which can be picked up as war surplus for about $5, make excellent back-yard wading pools. The pool shown was cut from a wing tank made for a B-17 bomber. It was laminated neoprene and cloth and required a couple of hours of cutting time, but it was so stiff that no frame was needed for rigidity."
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.