Like philatelists filling the last empty space in a series of cherished stamps, physicists have now found the last subatomic particle that is needed to make the universe neatly and electrically symmetrical. The Radiation Laboratory of the University of California announced last week that a team of physicists (Drs. Bruce Cork, Glen Lambertson, Oreste Piccioni, William Wenzel) has identified the antineutron, which differs from ordinary neutrons in the opposite direction of its magnetic field.
Like the identification nearly a year ago of the antiproton (TIME, Oct. 31), the work was done with the...
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