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Researchers used DNA data and self-reported lifestyle surveys from nearly 2,500 participants in the National Longitudinal Study of Adolescent Health, the largest and most comprehensive survey of health-related behavior among adolescents between 7th and 12th grade, which started in 1994. Slightly more than half of the study's male participants had low-level activity on the MAO-A gene, and about 3% of the total pool reported having joined a named gang in the past year. (See pictures of gangs in New Zealand...
...uneasy mix between bad genes and a bad environment. How much control nature has over nurture, however, is the question. Previous studies of the MAO-A gene suggest that interplay may begin in early childhood. A British study of 442 New Zealand men, published in 2003, was among the first to find that those with a low-active MAO-A gene, who had been abused as children, were four times more likely to have committed rapes, robberies and assaults than the general population. Those with high-active MAO-A genes, moreover, appeared to be immune to childhood mistreatment, turning...
Hence Greenpeace's four-year-long campaign to pressure paper companies like Kimberly-Clark - which makes Kleenex, Scott and Cottonelle, among other brands - to stop cutting down virgin forests. Says Lindsey Allen, Greenpeace's forest campaigner: "We know it's possible to act differently...
...with his or her grade-point average in school. In one study, psychologists at Hendrix College in Arkansas found that college freshmen who kept night-owl hours had lower GPAs than early birds. Another group at the University of Pittsburgh revealed that poor sleep habits among high-schoolers led to lower grades, particularly in math. (See pictures of the college dorm's evolution...
...House, like the Senate, has set an ambitious timetable for itself to get the bill passed. Waxman, for instance, expects to hold hearings on the plan later this month and begin drafting his bill shortly after the July 4 recess. Any differences among the versions produced by the three committees would be worked out by the House Rules Committee - which, in practice, means that Speaker Nancy Pelosi will have a strong say in the shape of the final product. House leaders hope to have a bill on the floor by the final week of July...