1975, Advent of Tomography: "Medicine is making the internal structures of the body far more accessible by noninvasive procedures. 1975Charming Quarks“When the quark hypothesis was first proposed more than 10 years ago, there were supposed to be three kinds of quark. One of the quark flavors is distinguished by the property called charm (another arbitrary term). The concept of charm was suggested in 1964, but until last year it had remained an untested conjecture. The apparatus was arranged with an enclosed mirror, so that the rays were projected against the clouds, which served as a screen.