For a factory where robots toil around the clock to build a rocket with almost no human labor, the sound of grunts echoing across the parking lot make for a jarring contrast. “That’s Keanu Reeves’ ...

For the past three years, the Dutch 3D-printing company MX3D has been working to build what is possibly the world’s coolest steel footbridge. Designed to stretch across Amsterdam’s Oudezijds ...