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Science News for November 21, 2002


Healthy diet index study discloses dramatic reductions in chronic disease risk

Researchers analyzed data from two large studies and found that individuals with the highest adherence to dietary guidelines had significantly lower risks of chronic diseases. Men in the highest-scoring quintile of the AHEI had a 20% reduced risk of developing major chronic disease, while women had an 11% reduced risk.

SourceAmerican Journal of Clinical Nutrition·JournalAmerican Journal of Clinical Nutrition·DateNov 21, 2002

High iron stores in women of reproductive age may increase cardiovascular risk

A recent study published in the American Journal of Clinical Nutrition found that high iron stores in women of reproductive age may increase the risk of cardiovascular disease. The research analyzed serum ferritin concentrations and their impact on cardiovascular risk factors, revealing a significant association between iron levels and...

SourceAmerican Journal of Clinical Nutrition·JournalAmerican Journal of Clinical Nutrition·DateNov 21, 2002

Black holes in a double pack

Astronomers detected two active black holes at the center of galaxy NGC 6240 using NASA's Chandra X-ray Observatory. The binary black hole system will eventually merge, producing massive gravitational waves detectable by LISA.

SourceMax-Planck-Gesellschaft·JournalThe Astrophysical Journal Letters·DateNov 21, 2002

Statins benefit older people

A recent study found that pravastatin treatment reduced coronary death, non-fatal heart attack, and fatal or non-fatal stroke by 15% in adults aged 70-82. The benefits were most pronounced for reducing death from heart disease, with a nearly 25% relative risk reduction.

SourceThe Lancet_DELETED·JournalThe Lancet·DateNov 21, 2002

To thin or not to thin

Forest thinning may improve plant diversity and support animal habitats if done correctly, according to USGS-funded research. The study found that selective thinning of dense young forests can promote the growth of hardwoods, large trees, and old-growth characteristics.

Unearthing the San Andreas fault zone

Researchers have made key findings about the San Andreas fault system, predicting major earthquakes within 30 years for certain areas. The study, which analyzed paleoseismic data from 10 sites, suggests that at least 120 miles of the southernmost section of the fault may rupture in a large earthquake of magnitude 7.6 to 7.8.

SourceU.S. Geological Survey·JournalBulletin of the Seismological Society of America·DateNov 21, 2002