3D printing

Have you heard of this? Most people have not but it is an exciting area of technology destined to have a major impact.
According to one definition it is "a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material".
Basically you take a digital file (e.g. from an email), give it to the 3D printer and it recreates an object from scratch out of a polymer.
Here is an article on it from Wikipedia.