More details are emerging about the development of China's zero-gravity 3D printer, which was recently subjected to several zero-gravity test flights. The printer will play a critical role in the construction and maintenance of China's space station, which the country intends to be completed in 2020. The 3D printed test parts included several tools and components necessary for building said space station, and, while there's still a lot of work to be done, the printer's successful operation is a big step forward for China in terms of reaching their goal. Read more at