Contents

21 December 2007
Vol 318, Issue 5858

About The Cover

Cover image expansion

COVER A T-shirt bearing an annotated gene-sequence map of human chromosome 1 symbolizes the Breakthrough of the Year for 2007--the realization that DNA differs from person to person much more than researchers had suspected. This conceptual advance, driven by results from several fields, may transform medicine but could also threaten personal privacy. See the special section beginning on page 1842. Photo illustration: Joe Zeff Design Inc.