Word: tested
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...existence. Before embarking on such research, however, scientists had to wait for a working group at the National Institutes of Health to vet the stem-cell lines and ensure that they were generated responsibly, according to stringent ethical and scientific principles. In December, the first lines to pass this test became available. See the top 10 green ideas...
...require aggressive treatment. In March, a 10-year National Cancer Institute study involving more than 76,000 men seemed to make the case for watchful waiting. About half of the study volunteers were randomly assigned to the screening group, getting either a manual exam or a prostate-specific antigen test each year; the latter test measures blood levels of a protein associated with prostate cancer. The other study participants received no screening guidance and were left to decide on their own whether they would get a yearly test. At the seven-year mark, 50 men had died from prostate cancer...
...learning ability. Early tracking of students in China ensures that only the best and brightest can receive college-prep education; others are put into vocational schools or the workforce. If I taught only students who had parental support and spent hours on homework, I certainly could show higher test scores. But I believe that anyone can achieve his dream. The surly teen may mature and realize he needs an education to get the job he loves; the struggling kid may be able to get to college with better study habits. Please don't insult American teachers in this...
...proving to be a difficult reality for Americans to accept. But the task force's mammography advice probably marks the leading edge of similar recommendations to come. Already, new guidelines on Pap smear screening for cervical cancer have delayed the age at which young women should begin regular testing and reduced the frequency of testing in older women. Doctors are also questioning the usefulness of prostate-cancer screening among otherwise healthy middle-aged men, as studies begin to show that the test, which has many risks, may not necessarily lead to fewer deaths from the usually slow-growing cancer...
Zuma's most public test will come next June, when South Africa stages the football World Cup - whose expected 500,000 fans will deliver an unprecedented challenge to his government's ability to deliver on security, transport and infrastructure upgrades. Zuma has also set himself other ambitious targets against which the South African public can judge him. In his state of the nation address in June, the new President promised half a million public-works jobs by the end of this year and 4 million by 2014; universal primary education and 95% enrolment in secondary schools...