Contents

05 January 2007
Vol 315, Issue 5808

About The Cover

Cover image expansion

COVER Artist's conception of the IceCube array of photodetectors now under construction at the South Pole. When complete, IceCube will detect neutrinos originating from collisions of cosmic rays with nitrogen and oxygen in the Northern Hemisphere; neutrinos reaching the detector must first pass through the entire planet. See the special section on particle astrophysics beginning on page 55. Image: Chris Bickel/Science