The world of 3-D printing is changing fast. New materials are announced and new systems are proposed almost every month. And as with any fast-growing technology, there is a lot of hype. When something is announced it will get a lot of press and attention, but what do you really need to know to follow the industry? In “Five 3-D printing breakthroughs everyone needs to know about” I take a look at the changes that should have the most impact on product development.