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medium1.jpgCHICAGO (Reuters) – Ultra-high energy cosmic rays — particles that pack the punch of a rifle shot — make their way to Earth from massive black holes in nearby galaxies, scientists said on Thursday, in a finding that may solve a mystery that has puzzled physicists for decades.

This sub-atomic matter, they believe, likely breaks free just before stars, gas and dust are gobbled up by the gravitational pull of black holes so dense that not even light can escape.

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