Hi there. Well, as topic says, nasa using advanced 3D printing technology, for building ships for space flights. Great job guys! Not for nothing, there are movies about Nasa! ( no sarcasm and irony)
As you can read, by the link, such way of “creating” seems to be more efficent, than traditional. Anyway, it's a good news for humanity's space dreams, don't you think!
Source: Cool Sci-Fi