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Iron-ic twist deepens cosmic ray puzzle

Researchers present new findings about the most energetic charged particles in the universe

BLOIS, France — In the genteel surroundings of the Blois chateau, home to 17th century French royalty, a controversial finding about the highest-energy cosmic rays has landed with a thud. If confirmed, a new report could spark a revolution in the way astronomers think about these speedy but rare charged particles, which carry as much oomph as a big league pitcher’s fastball.

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