An evaporating colloidal particle–laden droplet leaves behind a ring-like residue after drying. We routinely observe this ubiquitous phenomenon for dried coffee drops; thus, it is known as the "coffee ...

Imagine 3D printing a house with the touch of a couple of buttons. Or, even creating a house you have designed yourself. While the logistics of that may be a little ways off, the first steps towards ...

Etsy Cracks Down on 3D-Printed Designs, But Who Decides What's Original? The online marketplace now requires computerized creations from 3D printers, Cricuts, and CNC machines to be original ...