Gone are the days in which tattoos were just permanent wearable decor on one’s body. Now, scientists are hoping to add some function to the permanent skin marking. Researchers at the Technical ...

Scientists in Germany have developed three different tattoo dyes that change color based on the levels of certain health markers in the blood. Scientists are developing color-changing inks that may ...

In Neal Stephenson’s sci-fi novel The Diamond Age, body art has evolved into “constantly shifting mediatronic tattoos”—in-skin displays powered by nanotech robopigments. In the 25 years since the ...