McDonald explains that he and Mets–both based in Brooklyn–started trading ideas about pen plotters, drawing, and 3-D printing earlier this year. Computer drawing has been around for decades, but the ...

3D printers are great at creating complex geometry out of plastic, and that geometry can often pull off some impressive tricks. [DaveMakesStuff] found a way to generate geometry that draws 2D shapes ...

Biology works in 3-D, so why not your doctor? The BioPen could make it easier for doctors to repair tissue or bones in cases of injury or even aging. A handheld surgical “pen” that works a little like ...