Research News . Photochromic Ink Inspired by Cephalopod’s Skin . Meeri Kim Novel ink composed of colorful microbeads responds to radiation by light-driven phase separation. [Image: The University of Hong Kong] Inspired by the skin of cephalopods, researchers in Hong Kong have developed a new color-changing material that reversibly responds to light (Nature, doi: 10.1038/s41586-023-05873-4 ). The smart material is composed of photosensitive cyan, magenta and yellow microb...