Photo: Courtesy of Makerbot Every week seems to bring a new story about a cool new 3D printer hack or another discussion (like this Innovators @ Google talk from two of the guys behind the Makerbot 3D ...

An exact description of 3D printing is somewhat elusive because several methods may be used; but most 3D printers stack thin layers of material to form a 3D object in much the same way that a ...