Two years ago, New Zealand company Rocket Lab announced that they had developed the world's first battery-powered rocket, and that the engine would be almost entirely 3D printed. This week or next, that rocket will finally be going into space, if everything goes according to plan. Rocket Lab has been given a window of between today and June 3 to fire the Electron rocket into orbit, as long as the weather cooperates and no last-minute technical difficulties keep the rocket grounded. Read more at 3DPrint.com: http://3dprint.com/175195/rocket-lab...rocket-launch/