Table of Contents

02 September 2011
Vol 333, Issue 6047

About The Cover

Cover image expansion

COVER Bacteria constructed from toy building bricks represent the potential of synthetic biology to design and construct genetic modules that can be used to introduce new functions into existing organisms or even to engineer new biological systems. A special section highlights how this field is contributing to our understanding of biology and harnessing this understanding to benefit humanity. See p. 1235. Image: Equinox Graphics/Photo Researchers, Inc.