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Inventions

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A bicycle made from cardboard that costs only $9 to $12 to build sounds unlikely. But, as surfaced on the blog Kottke, designer Izhar Gafni got it in his head to make just that. After 3 years of perfecting the design, he created the Alfa.

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YouTube.com

Why? Contour Crafting is a construction technology that potentially reduces energy use and emissions by using a rapid-prototype or 3-D printing process to fabricate large components. Comprised of robotic arms and extrusion nozzles, a computer-control

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