SO META A new metamaterial, illustrated, uses precise vibrations to allow underwater sound to be transmitted through it. (Blue and red show vibrations in opposite directions.)
Sam Lee/Yonsei University
TANGLY TENDRILS This colony of E. coli bacteria gets its wrinkly look thanks to tendrils of cellulose that it uses to build a supertight, sticky web. A new view of microbes’ cellulose shows how it’s different from the kind found in plants.
ULTRATHIN FILMS Computer simulations reveal the properties of a little-studied group of synthetic materials: 2-D arrays of metal atoms arranged in honeycombs (illustrated), triangles or squares.