Word: factor
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Dates: during 1960-1969
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...factor affecting the size of the market-and the fares-will be the selling price of the SST, now calculated at $40 million a plane. The price of developing new airplanes has an unsettlingly steep rate of climb. The Concorde's development costs so far have almost quadrupled to $1.72 billion, and the price tag has risen from $ 12 million a plane to $21 million...
...alone last week, an estimated 115,000 acres of it were nearly ready for harvesting?by any would-be pot-gatherers who could sneak by the police. Yet despite the plenitude of "Tennessee blue" and "Bethesda gold," rising demand for pot in the U.S. has recently been a major factor in producing a marijuana famine in many U.S. cities. Many authorities say that the dearth of pot is prompting users to take up harder drugs like amphetamines or even heroin...
...such arguments, one curious factor works...
...find the teeming cities to be excellent breeding grounds for unrest-and perfect places to hide. What makes urban terrorism particularly attractive to them is the fact that incidents occurring in the cities usually get far more publicity than do those that take place in the countryside-an important factor...
...factor over which would-be parents have some control, provided they start to exercise it early enough, is the age of the ovum at the time of conception. Rockefeller University's Dr. E. Witschi reported that studies in several animal species show that an old or "stale" egg is especially likely, if fertilized, to result in the birth of a defective baby. In humans, it is known that the risk of having a mongoloid, for instance, increases from one in 2,000 births for a woman at age 25 to one in 50 at age 45. For a woman...