SCIENCE VOL. 305, NO. 5689, SEPTEMBER 3 ; 2004

Rheingold, and Karsten Meyer
Age and Timing of the Permian Mass Extinctions: U/Pb Dating of
Closed-System Zircons
Roland Mundil, Kenneth R. Ludwig, Ian Metcalfe, and Paul R. Renne
Molecular Cloud Origin for the Oxygen Isotope Heterogeneity in the
Solar System
Hisayoshi Yurimoto and Kiyoshi Kuramoto
Middle Miocene Southern Ocean Cooling and Antarctic Cryosphere
Expansion
Amelia E. Shevenell, James P. Kennett, and David W. Lea
Crystal Structure of a Shark Single-Domain Antibody V Region in
Complex with Lysozyme
Robyn L. Stanfield, Helen Dooley, Martin F. Flajnik, and Ian A. Wilson
Defining a Link with Asthma in Mice Congenitally Deficient in
Eosinophils
James J. Lee, Dawn Dimina, MiMi P. Macias, Sergei I. Ochkur,
Michael P. McGarry, Katie R. O'Neill, Cheryl Protheroe, Ralph Pero,
Thanh Nguyen, Stephania A. Cormier, Elizabeth Lenkiewicz, Dana
Colbert, Lisa Rinaldi, Steven J. Ackerman, Charles G. Irvin, and Nancy
A. Lee
A Critical Role for Eosinophils in Allergic Airways Remodeling
Alison A. Humbles, Clare M. Lloyd, Sarah J. McMillan, Daniel S.
Friend, Georgina Xanthou, Erin. E. McKenna, Sorina Ghiran, Norma P.
Gerard, Channing Yu, Stuart H. Orkin, and Craig Gerard
Children Creating Core Properties of Language: Evidence from an
Emerging Sign Language in Nicaragua
Ann Senghas, Sotaro Kita, and Asli Özyürek
Two Distinct Actin Networks Drive the Protrusion of Migrating Cells
A. Ponti, M. Machacek, S. L. Gupton, C. M. Waterman-Storer, and G.
Danuser
Zooming In on a Quantitative Trait for Tomato Yield Using
Interspecific Introgressions
Eyal Fridman, Fernando Carrari, Yong-Sheng Liu, Alisdair R. Fernie,
and Dani Zamir
Technical Comments
Comment on "The Early Evolution of the Tetrapod Humerus"
P. E. Ahlberg
Response to Comment on "The Early Evolution of the Tetrapod
Humerus"
Michael I. Coates, Neil H. Shubin, and Edward B. Daeschler
COMMENTARY
Editorial
Talking with North Korea
Norman P. Neureiter
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Letters
Hollywood, Climate Change, and the Public Andrew Balmford, Andrea 1713