Contents

24 July 2009
Vol 325, Issue 5939

About The Cover

Cover image expansion

COVER A computer-generated map showing relationships between Internet blogs (colored spots), where lines represent links between individual blogs. In this map, blogs within the inner core cover technical topics and gadgetry, and blogs in the outer sphere involve nontechnical discussions and link back to the technical ones. See the special section on complex systems and networks beginning on page 405.

Image: Matthew Hurst