Watch 3D printed objects appear in the middle of a gel

Ghostly 3D printer sculpts “The Thinker” before your eyes. Learn more: Read the paper ($): CREDITS producer Sarah Crespi story by Robert F. Service citation B. E. Kelly et al.,Science 2019 DOI: photos and video printed doughnut photo Hossein Heidari/Brett Kelly printer diagram Hayden Taylor Rodin thinker printing