A YouTuber’s latest 3D printer project includes a real tattoo gun and a large clamp to keep your skin in place.

Open the Youtube video In a world where 3D printers can make everything from prosthetic limbs to pizza, one engineer has ...

Most of the teams came up with similar ideas, but one team went above and beyond the call of duty; they turned a 3D printer into a tattoo machine, capable of inking a real, live human test subject.