Living Crystal (IMAGE) Rockefeller University Caption Thiovulum cells cluster together to form a repeating pattern known hexagonal lattice. It is the densest geometrical arrangement for things of uniform size, and it appears frequently in nature, in bees' honeycomb, for example. Credit The Laboratory of Condensed Matter Physics at Rockefeller University/Physical Review Letters Usage Restrictions Image may be used only to illustrate the research described in the accompanying story. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.