Word: quark
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Dates: during 1960-1969
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...need for this key building block of the universe became so great that in 1962 Physicists Murray Gell-Mann and George Zweig, working independently, devised and described hypothetical particles that would meet all of the necessary requirements. Gell-Mann insisted that his particle, which he called the quark,*was simply a theoretical tool useful in describing the nature of subatomic particles; it did not necessarily have to exist. But ever since, physicists have been searching in vain for a real quark. Now two British scientists, writing in Nature, have suggested that the search for the quark be conducted...