and smaller structures, are an immense numberof otinier elementary particles,  leveland so on forever—an infinite dohin universes, endlessly.

    And upward as well.”

    For most of us it is a  surpasses understanding. to read even an elementary guideto particle p nos sucipion decay respectively into a muon plus antineutrino and anantimuon plus neutrino ime of 2.603 x 10-8seconds, tral piondecays into time of about 0.8 x 10-16seconds, and timuon decay respectively into . . .” And so it runs on—and t lucid of interpreters, Steven einberg.

    In ttempt to bring just a little simplicity to matters, tecMurray Gell-Mann invented a neicles, essentially, in teveneinberg, “to restore some economy to titude of ive term used byps for protons, neutrons, and oticles governed by trong nuclear force.

    Gell-Mann’s t all ill smaller, even morefundamental particles. ed to call ticles partons, as in Dolly, but ead they became known as quarks.

    Gell-Mann took terMark!” (Discriminating ps rorks, not larks, even tter is almost certainly tion Joyce al simplicity ofquarks  long lived. As tter understood it o introducesubdivisions. Altoo small to aste or any oteristics o six categories—up, dorange, cop, and bottom—o as to ts t it  altogetal t terms  applied in California during tually out of all t is called tandard Model,  of parts kit for tomic andard Model consists of six quarks, sixleptons, five knoulated sixttisist, Peter rong and romagnetism.

    t essentially is t am