3-D Printers Produce Objects, Even Prosthetic Limbs (Video)
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A 3-D printer, which has nothing to do with paper printers, creates an object by stacking one layer of material -- typically plastic or metal -- on top of another, much the same way a pastry chef makes baklava with sheets of phyllo dough. The technology has been radically transformed from its origins as a tool used by manufacturers and designers to build prototypes. New York Times
