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Science 13 July 2007:
Vol. 317. no. 5835, pp. 178 - 179
DOI: 10.1126/science.317.5835.178
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News of the Week

ASTROPHYSICS:
Enormous Detector Forces Rethink Of Highest Energy Cosmic Rays

Adrian Cho

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.

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