In Arizona´s Sonoran Desert,15 miles west of Tucson, the depressed and ailing come to bathe in the gentle blue-white beam of Richard Chapin´s 50-foot-tall moonlight collector.
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.
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