12 October 2012
Vol 338, Issue 6104

About The Cover

Cover image expansion

COVER False-colored scanning electron micrograph of a zebrafish (Danio rerio) embryo (~0.7 millimeters across) at a late stage of development. Biophysical studies of model organisms such as zebrafish reveal forces that organize tissue patterns and shape cell layers and physical features (segments, cavities, and folds). The special section beginning on page 209 presents work in which physicists and biologists collaborate to explain the physical mechanisms of animal development. Image: Dr. Richard Kessel/Visuals Unlimited, Inc.