YouTube - ‪3D Printer‬‏

YouTube - ‪3D Printer‬‏: "If you listen carefully when they discuss about the wrench that was made, they said that they are strengthened just by fusing the material they use. Basically, no organic objects unless you print a bone. Print a heart or kidney with that thing, they won't function. The heart has to move in order to keep up the blood flow."