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Cosmic ray space experiment is “working perfectly”

A direct search for realms of the universe made entirely of antimatter has begun, with the installation of a $2 billion cosmic ray detector on the International Space Station. The instrument has been detecting cosmic rays for a day and appears to be “working perfectly,” its principal investigator tells Nature. “We’ve collected thousands of events so far,” says Samuel Ting, a Nobel Prize winning physicist at the Massachusetts Institute of Technology and spokesman for the Alpha Magnetic Spectrometer. 


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