Word: watered
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Dates: during 1960-1969
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...their wake came a 6-in. saltwater trash fish, the alewife (TIME, July 7, 1967), which monopolized the lakes. Four years ago, the Michigan Department of Conservation tried a bold gambit: it transported coho roe from the Pacific coast in the hope that the fingerlings would adapt to fresh water and feed on the plague of alewives...
...atmosphere, Moscow made a dramatic announcement: Zond had splashed down "in a pre-set area of the Indian Ocean," its scientific mission ''fully carried out," and had been picked up by a Soviet ship. Western trackers confirmed the successful reentry, reporting that Zond had parachuted into the water at only 6.8 m.p.h...
...major hitch has been temperature. Aerial "seeding" with crystals of dry ice can be used easily enough to turn fog into snow when the water droplets are at temperatures below freezing. That technique is regularly used at 21 major U.S. airports. But such "cold" fog accounts for only 5% of airport shutdowns in the continental U.S. The rest are caused by fog at temperatures above freezing, which until now could only be dispelled by chemicals that corroded metals, destroyed plant life or simply cost too much...
...Sweep's chemicals are of a nontoxic, noncorrosive variety commonly used in the disposal of sewage and industrial wastes. One type, known as polyelectrolytes, imparts tiny electrical charges to the billions of airborne water droplets. Once charged, the droplets attract one another, combine, and often plunge to the ground as rain. Even if no precipitation occurs, the reduction of the number of droplets in the air alone improves visibility. Other chemicals, called surfactants, push the fog-clearing process along by relaxing the droplets' surface tension, the contracting tendency that helps give them their particular size and shape...
...Etruscans, was so exacting that artists have devoted a lifetime to mastering the technique. First, the brick wall had to be prepared with several coats of a special plaster made with slaked lime that had been aged for a year or so. Then the painter deftly laid on his water-base colors, which were sucked into the wall by capillary action. He had to work quickly, for the paint he added after the plaster had dried lay on the surface and could eventually flake off. But color applied while the plaster was damp stayed in it for centuries. As visitors...