What's next after 3D printing? 4D printing, of course!

Just announced at the TED conference, 4D printers will incorporate time as the fourth dimension, so that the objects they create change their form when activated. "This is a whole new idea of printing, where you don’t just print static objects; you print things that turn into other things," explained Skylar Tibbits, an M.I.T. researcher who is working on the printer collaboration with Stratasys, an Israeli 3-D printing company.