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Sixty years ago Gell-Mann introduced, with a striking sense of caution, a newfundamental layer in the structure of matter. He christened the associatedparticles 'quarks', a name borrowed from the psychedelic flood of words ofJames Joyce's novel Finnegans Wake. Independently and simultaneously, Zweigarrived at similar ideas. We outline the circumstances that led to theintroduction of quarks.

How quarks made their entrance into our worldview via cosmic rays and proton accelerators