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Old 04-18-2012, 08:43 PM
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Scientists are baffled as to the source of super energetic cosmic rays. As yet, the source is unknown, but some suspects have pretty much been ruled out, such as neutrinos. Among the suspects are supermassive black holes at the nuclei of galaxies that may cause gravitationally driven particles to be ejected at enormous speeds generating ultra-high energy levels. Such supermassive black holes are known to generate strong gamma ray bursts, but it looks like gamma rays at this magnitude are ruled out. More study is needed to try to find the answer.

Cosmic Ray Mystery Leave Scientists in the Dark | Gamma-Ray Bursts | Space.com
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