These tiny tattoos change color when you need to put on sunscreen

Dynamic, high-tech tattoos are almost here, and they’ll be able to detect everything from UV rays to cancer. 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 novel was published, nanotechnology has had time to catch up, and the sci-fi vision of dynamic tattoos is starting to become a reality. Read Full Story