Word: knowns
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Dates: during 1960-1969
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...first successful electric automobile self-starter. "First they tell you you're wrong, and they can prove it," said Kettering. "Then they tell you you're right, but it's not important. Then they tell you it's important, but they've known it for years...
...chemicals concocted by man have been so widely used and so thoroughly applauded as dichlorodiphenyltrichloroethane, more commonly known as DDT. It has proved its unmatched power in the worldwide battle against those pestborne killers, typhus, encephalitis and, particularly, malaria. Its mastery over the mosquitoes that carry malaria has undoubtedly spared millions of people from death and debilitating infection. Equally potent in saving crops, it has almost doubled the yield from U.S. cotton fields in the past two decades by controlling the boll weevil. Even the Swedes, who have decided to ban the chemical, readily acknowledge its effectiveness. In 1948 they...
...Montrose Chemical Corp., the world's largest DDT producer, and federal prisoners who voluntarily accepted daily doses of DDT in Atlanta. In both cases, they say, there was no damage. But other scientists, including Stanford Molecular Biologist Joshua Lederberg, a Nobel laureate, explain that far too little is known about how DDT reacts with other body chemicals to acquit the pesticide so readily...
...final gambit after all. On view is an entire room designed by Duchamp to accommodate a life-size environmental work on which he had secretly worked over a period of 20 years. He had even planned its installation at the museum, but the work's existence was known only to his wife and a few friends...
...fact that Tanner was able to make a career in a sphere that had known virtually no Negroes marked him as a man of exceptional drive. He was also more fortunate in family background and education than were most U.S. Negroes of the period. Born in 1859, the son of an African Methodist minister, the artist was raised in Philadelphia and attended high school. He became entranced with painting at the age of twelve when he saw a landscapist at work during an outing with his father in Fairmount Park...