Regular printers are pretty handy, but their up-and-coming cousins, 3-D printers, add a whole new dimension to the printing process. Literally! How much do you know about the fascinating field of 3-D printing? Take this quiz and find out!
DVD movies have region codes, and they typically only play on a player or DVD-ROM drive sold in the country where the DVD movie was sold. Find out why and how they're produced this way.