The first concrete 3-D printed building in the world was completed in a Minneapolis, Minn. suburb in August, 2014. Engineer Andrey Rudenko “printed” out the authentic looking castle layer by layer using a machine he invented in his garage.
My Africa Is Lagos: WeCyclers. The Floating School. Avante Garde Fashion Photography. Dakar: Le Journal Rappe. Malika Surf Camp. Sunu Street Project. Diaspora: Sonic Diaspora. Os Kuduristas. Technologie Democracy. (via)
Lockheed Martin is in a race with SpaceX who recently made a big splash with 3D printed spacecraft parts. Lockheed shows its vision (video) for a next generation 3D printer, capable of printing not just parts but an entire plane as a print-job (c.f. previously war robots). This technology may perhaps combine with a new class of fractal nano supermaterials, which are stronger than steel but nearly as light as air, the promise to create mass produced ultra-light vehicles, aircraft and other things. [more inside]
Two-year-old Emma wanted to play with blocks, but a condition called arthrogryposis meant she couldn't move her arms. So researchers at a Delaware hospital 3D printed a durable custom exoskeleton with the tiny, lightweight parts she needed.
"To the best of my knowledge, this is the first 3D printed firearm in the world to actually be tested." Gentleman describes how he used an old 3D printer and CAD files to print his own working gun.(*)
RepRap is a self-replicating rapid prototype machine (3D printer) using fused deposition modelling. You can build one, although I'm not sure why you'd need to....