Contents

13 April 2001
Vol 292, Issue 5515

About The Cover

Cover image expansion

COVER Barn owls can pinpoint prey by sound in the dark. The differences in arrival time and intensity of sound between the two ears of the owl indicate the target's position. Separate neural pathways process these two cues and converge on neurons that combine the time and intensity signals by multiplication. See page 249 [Photo: Ben Arthur]