A mixture of two types of pigment-producing cells undergoes diffusiophoretic transport to self-assemble into a hexagonal pattern. Credit: Siamak Mirfendereski and Ankur Gupta/CU Boulder A zebra’s ...

The strikingly patterned ornate boxfish has no lack of detail when it comes to its hexagonal spots and keen stripes — the intricate markings are so sharp-edged in the species that it had engineers at ...