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Enlarging the Evidence. Walker's most proven technique is based on the fact that most rocks and minerals contain a small impurity of uranium, which fissions (splits), leaving tiny scars or tracks inside the substance. Until recently, this phenomenon remained unobserved. Walker found that even with an electron microscope the fossil tracks were too tiny-.001 of an inch long and only ten atoms wide-to see in significant numbers...
...Electron microscopists have since photographed lysosomes, and Dr. de Duve, now at Rockefeller University, has figured out some of the ways they work (see diagram). In a typical case, a foreign particle (it may be a virus, a bacterium or a chemical) reaches the side of a cell and is sucked in, sealed off by a piece of the cell's own membrane. Standing by inside the cell is a lysosome, packed with enzymes. Lysosome and invader, now packaged in a phagosome, are drawn together and fuse. In the resulting sac, called a vacuole, the foreign substance is digested...
Mass into Energy. Gell-Mann's quark is an unusual creature indeed. Unlike other known particles, which are electrically neutral or have positive or negative charges that are whole multiples of the basic charge of the electron, quarks would have a charge of either one-third or two-thirds of the unit electron charge. Arranged in different combinations, quarks would form practically any one of the confusing variety of subatomic particles...
Last week the long suspense ended. The world's most powerful atom smasher, which will generate 200 billion electron volts of energy, will be built in Weston, Ill., a tiny (pop. 400) village 35 miles west of Chicago. A corn-belt community that began as a housing development only seven years ago, Weston is in for some very big changes. Its growth was stunted when the original promoter ran into financial difficulty and pulled out, and it remains so undeveloped today that it has no doctor, no school, no movie house, not even a store...
...shielding, is targeted to go into operation in 1975. Assuming that Congress appropriates the funds, construction will begin in two years. By enabling scientists to break down the atom into more fundamental pieces than ever before, the smasher could eventually produce discoveries on the magnitude of those of the electron and neutron...