News of the WeekAstrophysics

Enormous Detector Forces Rethink Of Highest Energy Cosmic Rays

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Science  13 Jul 2007:
Vol. 317, Issue 5835, pp. 178-179
DOI: 10.1126/science.317.5835.178

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Physicists at an ultrasensitive cosmic-ray observatory in Argentina say puzzled theorists can stop trying to explain ultrahigh-energy particles that other instruments had spotted streaming from outer space: the particles weren�t there.