Contents

06 February 2004
Vol 303, Issue 5659

About The Cover

Cover image expansion

COVER A processed image used to study the topology and geometry of vein networks in a leaf of the tropical tree Gloeospermum sphaerocarpum. The network magnification is x25.375. This special section, along with online material listed below, describes some ways in which researchers are bringing mathematical ideas to bear on problems in the life sciences. See page 781. [Image: S. Bohn, B. Andreotti, and Y. Couder/École Normale Supérieure, Paris]