Table of Contents

01 July 2005
Vol 309, Issue 5731

About The Cover

Cover image expansion

COVER Science began publication on 3 July 1880. A special section marks the journal's 125th anniversary by exploring 125 questions that point to gaps in our basic scientific knowledge. See page 75. [Kelly Buckheit/Science; images, clockwise from top: Jupiter Images, JPL/NASA, Louie Psihoyos/Corbis, JPL/NASA, NASA/JPL/Cornell, Hans Pfletschinger/Peter Arnold]