A new 3-D printer builds temporary electronics on your skin
You won’t mess up the machine’s design, even if you twitch
![3-D printed wireless light-up device on a hand](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/06/060518_MT_3d-printing_feat.jpg?fit=860%2C460&ssl=1)
ON HAND A new 3-D printer creates wireless, light-up devices (one shown) or health sensors directly on a person’s skin, like high-tech temporary tattoos.
McAlpine Group/University of Minnesota