Word: width
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Dates: during 1990-1999
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...femtoseconds, which are millionths of a billionth of a second. How fast is that? Well, in little more than a second, light can travel all the way from the moon to the earth, but in a femtosecond it traverses a distance that is but one hundredth the width of a human hair. "This sort of time scale is almost impossible to imagine," exclaims L.B.L. director Charles Shank, who helped pioneer the technology...
...nation is still searching for its soul in Mississippi's Delta. Thirty years ago, blacks risked their lives if they tried to vote. Today there are 28 black mayors in the Delta, an area about 200 miles top to bottom and 85 miles at its greatest width, with 340,000 people, 55% black. There are black sheriffs, police chiefs, city-council and county-board majorities. Just across the tracks from Henry's store is the office of Henry Espy, black mayor of Clarksdale, at 20,000 the upper Delta's largest city. "I am convinced the South is the promised...
...mounted on airplanes, can detect increases in sulfur-dioxide emissions, indicating that magma has reached the surface. In addition, the physical swelling of mountain slopes, well documented at Mount St. Helens, is a sign of explosive potential. Laser-based devices can pick up minute bulges that are about the width of a nickel and still invisible to the naked eye. In Japan researchers have set up video cameras to monitor the shape and color of fumes at 19 of the country's most worrisome volcanoes...
...preferred alternative, "Committee Improvement Package 5," is one-half the width of Z and 35 feet lower, and has four fewer ramps and five fewer river piers...
Ever since Einstein, physicists have regarded the universe as four- dimensional. In addition to the three physical dimensions -- length, width and height -- there exists time, which is treated mathematically as though it were equivalent to the other three. But there is one important difference: while humans can travel freely in any physical direction -- up and down, left and right, back and forth -- they can go only forward in time, never backward...