Science: Cosmic Spray

Working with "coincidence counters" last year, the University of Padova's Professor Bruno Rossi, foremost of Italy's cosmic ray researchers, thought he had snared in his apparatus the trace of a radiation that came neither from outer space nor from earth's radioactive substances. It seemed to Professor Rossi that in darting through sheets of metal the primary cosmic rays gave birth to a secondary radiation of electric particles. Two other physicists got on the scent, found that the secondary particles were generated in the form of showers—like spray from the splash of...

Want the full story?

Subscribe Now


Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!