A regular 3D printer can be used to create 4D objects with proper design phase. Printing in "4D" might sound like something cooked up for a sci-fi novel, but it's actually a real object printing ...

Growth of geometrically complex objects (growth time: 60 min). So what is 4D printing? When would it be relevant beyond an R&D lab? What hardware, software and materials does it need for success?