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Text File  |  1992-09-03  |  281b  |  8 lines
  1. Unstable fundamental particle with mass
  2. intermediate between those of the electron
  3. and the proton, found in cosmic radiation and
  4. emitted by nuclei under bombardment by very
  5. high-energy particles. Its existence was
  6. predicted in 1935 by Japanese physicist
  7. Hideki Yukawa (1907-1981).
  8.