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Science 5 November 2004:
Vol. 306. no. 5698, p. 956
DOI: 10.1126/science.306.5698.956b
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News of the Week

HIGH-ENERGY ASTROPHYSICS:
Hot on the Trail of Cosmic Rays

Daniel Clery

CAMBRIDGE, U.K.--Researchers are closing in on finding the source of galactic cosmic rays, charged particles that whiz around the galaxy in huge numbers and constantly bombard Earth's upper atmosphere.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)