Contents

21 May 2004
Vol 304, Issue 5674

About The Cover

Cover image expansion

COVER Map of the Southern Hemisphere showing the wind resistance encountered in traveling from Bouvet Island (black square) for 1 to 10 May 2003 (increasing resistance from orange to blue; land and ice over oceans are black). Wind resistance predicts plant dispersal between landmasses, as described on page 1144. [Map: Á. M. Felicísimo]