Contents

26 September 2008
Vol 321, Issue 5897

About The Cover

Cover image expansion

COVER Boulders and roots, or spores and hyphae? Parallel microscopic and macroscopic worlds merge in this detail from one of the winners of this year's Science/NSF International Science & Engineering Visualization Challenge. See the special section beginning on page 1767. Image: Colleen Champ, with micrographs by Dennis Kunkel.