Word: sun
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Dates: during 1990-1999
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Everyone knows ozone is necessary for protection from the sun's harmful ultraviolet rays. The phenomenon of Arctic spring, when ozone levels over the Arctic suddenly drop, leaving a hole, is also well-known. But scientists still wonder exactly what ozone does, how it works, and where it goes. What controls the amount of ozone in our atmosphere...
EVERY PRESIDENT RELISHES A SUN-DRENCHED ROSE Garden ceremony, but Bill Clinton's signing last Friday of the family-leave bill must have been especially welcome at the White House. After losing his first nominee for Attorney General and scrapping with Congress and the Pentagon over gays in the military, Clinton finally brought home a winner: the family-leave bill, which had endured eight years of Capitol Hill lobbying and two vetoes by George Bush. Said Clinton: "The first bill I am to sign as President truly puts people first. I am very appreciative that the Congress has moved...
...just a frivolous attempt to tamper with nature, the experiment could conceivably be the first step in providing extra daylight to sun-starved northern cities, extending planting and harvest periods and aiding nighttime rescue missions. Those goals will remain distant, however, until the Russians' space program, cash-starved after the end of the cold war, gets a new infusion of money. They'll need more than mirrors to pull off that trick...
...baseball hat had humble beginnings. In 1851, the New York Knickerbockers, a band of poorly paid ballplayers who rarely travelled outside Manhattan, began wearing straw hats to keep the afternoon sun out of their eyes...
...explode, nudging it into a new orbit that would carry it safely past Earth. For a small asteroid detected years and many orbits before its destined collision, the solution would be straightforward. "You apply some modest impulse to it at its perihelion, or closest point to the sun, using conventional explosives," explains Gregory Canavan, a senior scientist at Los Alamos National Laboratory. "The slight deflection that results will amplify during each orbit, ensuring that the asteroid misses Earth by a wide margin...