At first glance, it appears to be a straightforward task. The image shows a large square divided into a 3x3 grid, giving the impression of nine equal smaller squares. But there's a catch — and that’s ...

Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan, and Genesis Research Institute, Inc., 4-1-35 Noritake-Shinmachi, ...