Rolling robots 3D print a bridge, inching their way along the span as they lay it
by Cory Doctorow from on (#3X5KQ)
https://www.youtube.com/watch?v=QQZjaosDToU
The Smarter Bridge is a project led by Mix3d, which makes robotic 3D printers that can sinter stainless steel structures and inch their way along the surfaces as they are completed. (more")