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Researchers 'Print' Polymers That Bend Into 3-D Shapes - Christian Santangelo, Ryan Hayward and colleagues at the University of Massachusetts Amherst recently employed photographic techniques and polymer science to develop a new technique for printing two-dimensional sheets of polymers that can fold into three-dimensional shapes when water is added. The technique may lead to wide ranging practical applications from medicine to robotics. The researchers' work is described in the March 9, 2012 issue of the journal Science.