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19061
In this article it was speculated that calorie restriction reduces the production of free radicals. We have found that food deprivation almost doubles concentrations of melatonin in various parts of the gastrointestinal system. Melatonin, a very potent scavenger of free radicals, has increased the lifespan of mice in several studies. It could be that the […]
- Animals
Dogged Dieting: Low-cal canines enjoy longer life
The first completed diet-restriction study in a large animal shows that labrador retrievers fed 25 percent less food than those allowed to eat as much as they desired tend to live longer and suffer fewer age-related diseases.
- Earth
September’s Science: Shutdown of airlines aided contrail studies
The shutdown of commerical aviation within the United States for 3 days after Sept. 11, 2001, provided scientists with a unique opportunity to study the influence of high-flying jet aircraft on Earth's climate.
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19060
I agree that depression and smoking go together for a variety of physiological reasons, and it’s clear that people use nicotine to self-medicate. But your article’s title is unfortunate since we are treating people at our facility for nicotine-patch and nicotine-gum addiction. Our facility deals continuously with well-meaning attempts to respond to addiction, anxiety, and […]
- Health & Medicine
Could nicotine patch fight depression?
Chronic nicotine administration blocked a symptom of depression in an animal model of the disease.
- Health & Medicine
Fetal stress begets adult hypertension
Intense stress during pregnancy may program the baby's development in ways that foster high blood pressure during adulthood.
- Health & Medicine
With this bait, TB won’t play possum
An oral tuberculosis vaccine, designed to help curtail the spread of the disease in wildlife populations, may also find use in people.
- Astronomy
Physics-astronomy merger wins big
A new report recommends fostering the extraordinary collaboration taking place between particle physics and astronomy.
- Physics
Detector spots solar chameleons
A new measurement of the sun's emission of ghostly neutrinos indicates that the prevailing theory of particle physics needs repair.
- Health & Medicine
No benefit from screening
Two large studies confirm that a urine test for a common childhood cancer—neuroblastoma—offers no benefit.
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Boys take a tumble
A long-term study of children from grades 1 through 12 finds a disturbing tendency for boys to report much larger declines in appraisals of their academic abilities than do girls.
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19003
This article says, “While tornadoes are most common on the Great Plains and throughout the Mississippi River valley, they can occur almost anywhere in the United States.” Are tornadoes unique or more common in North America than elsewhere? Ruth HousmanNewton Center, Mass. Tornadoes have been spotted on every continent except Antarctica, says Harold Brooks of […]
