About the cover

September 2014 Volume 10 No 9

How do flocks of birds remain cohesive while dodging predators? A study tracking up to 400 starlings reveals that information propagates in a linear fashion and with no attenuation, meaning that the language of phase transitions in correlated materials can be used to describe flocking behaviour.

Article p691

IMAGE: EDWARD SHEN AND COBBS LAB, ISC-CNR, ROME

COVER DESIGN: ALLEN BEATTIE