Geeking Out on Materials: 3D-Print Circuits With Innovative Conductive Plastic: As we keep saying, for 3D printing to make its way into the mainstream, science needs to give us materials that can do more than just be hardened plastic. Researchers at the University of Warwick have just taken a huge step in the right direction with the introduction of a 3D-printable electrically conductive plastic. They're calling it "carbomorph."