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.

Open the Youtube video In a world where 3D printers can make everything from prosthetic limbs to pizza, one engineer has taken the technology to a new, slightly concerning level: tattooing human skin.

One 3D printing aficionado created the one device even the most tech-obsessed robot designer would question, designing a DIY automated tattoo machine to ink actual human flesh. There have been ...