So far, six kinds of quarks have been discovered by physicists, who have called them Up, Down, Strange, Charmed, Bottom and Top. There are a number of types, or "flavors," of quarks and each quark has one of three varieties of "color." (The terms "flavor" and "color," and other descriptive terms used in describing quarks, are fanciful and have nothing to do with the ordinary meanings of these words.) In addition to quarks, there are antiquarks, which are antiparticles that also correspond to each flavor and color of quark.
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