Uncategorized
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19455
It wasn’t the news of polluting runoff that caught my attention in your article, but the startling statistic that the 3 million annual increase in the U.S. population costs $480 billion in construction costs alone. That’s $160,000 dollars for each added person! John BrooksLake Shastina, Calif.
- Math
More Progressive Primes
The first sequence consisting of 23 prime numbers in arithmetic progression has been discovered.
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From the August 25, 1934, issue
Earrings from Oklahoma's mound builders, a bathysphere's record descent, and gamma rays for splitting atoms.
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Bone Biology
Susan Ott, a professor of medicine at the University of Washington, has created a Web site that provides information to physicians and others about bone physiology and osteoporosis. Topics include bone density, prevention and treatment of osteoporosis, and more. There’s also a special section for kids. Go to: http://courses.washington.edu/bonephys/
- Health & Medicine
Keeping Cells under Control: Enzyme suppression inhibits cancer spread
Shutting down an enzyme can slow the spread of cancer in mice.
- Earth
There’s a Catch: Recreation takes toll on marine fish
Recreational fishing isn't just a tiny, harmless nibble on saltwater-fish populations.
- Earth
North and South: Equal melting from each hemisphere raised ice age sea levels
The gargantuan volumes of meltwater that boosted sea levels during the most recent round of ice ages derived equally from ice sheets in the Northern and Southern Hemispheres.
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Ringing Out Despair: Phone therapy gets call as depression buster
Psychotherapy delivered over the telephone shows promise as a depression treatment when offered in conjunction with prescribed antidepressant medication.
- Astronomy
Super Portrait: X-ray telescope eyes supernova remnant
Trained on Cassiopeia A for 11.5 days, NASA's Chandra X-ray Observatory has taken the most detailed portrait ever recorded of any supernova remnant.
- Earth
Rounding Up Resistance: Weed sacrifices seeds to put up with a herbicide
Use of herbicides containing glyphosate can drive evolution in the tall morning glory, even though the weed must simultaneously sacrifice a measure of its fertility.
- Materials Science
Face to Face: Crystal-growth method bodes electric payoff
A new method for growing silicon carbide eliminates crystal defects that have long prevented the compound's wider use in electric devices.
- Health & Medicine
Vitamin may guard against mental decline
The B vitamin niacin may protect people against Alzheimer's disease and other forms of mental decline.
