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Verbal Brains: Neural word paths take a mature turn
A new brain-scan study indicates that the pattern of brain responses associated with word knowledge in adults has not fully matured by age 10.
- Health & Medicine
Look Ma, Too Much Soy: Hormone in infant food reduces immunity in mice
Large doses of the estrogenlike hormones that occur naturally in soybeans weaken the immune systems of mice.
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Better Mosquito: Transgenic versions spread less malaria
Genetic engineers for the first time have made a mosquito that's wonderfully bad at transmitting malaria.
- Materials Science
Beyond Jell-O: New ideas gel in the lab
Researchers have created a new class of hydrogels that might prove useful in tissue engineering, drug delivery, and other biomedical applications.
- Health & Medicine
Surgical Option: Removal of ovaries can prevent cancers in women at risk
In women who harbor mutations in one of the BRCA genes, ovary removal reduces the risk of developing ovarian, peritoneal, and breast cancers.
- Health & Medicine
High elevation linked to hormone dearth
Elderly Peruvian women living at very high altitudes have lower blood concentrations of some key hormones than do their lowland counterparts.
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From the May 21, 1932, issue
GENES, ONCE HYPOTHETICAL, NOW SEEN AND PHOTOGRAPHED Genes, the ultimate units in heredity, have been seen and photographed. So declares Dr. John Belling, biologist on the staff of the Carnegie Institution of Washington. Genes have hitherto been dealt with as hypothetical entities by biologists, because no one has ever actually seen them. They were like […]
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Science Fair Snapshots
Experience the 2002 Intel International Science and Engineering Fair, held recently in Louisville, Ky., via reports and photos produced by students from Kentucky school districts. Sorry! This web site is no longer available. For more current information on the Intel International Science and Engineering Fair, got to http://www.sciserv.org/isef/.
- Math
Prime Effort: Powerful conjecture may be proved
A mathematician may have finally proved Catalan's conjecture, a venerable problem in number theory concerning relationships among powers of whole numbers.
- Physics
Tiny tungsten beams lord over light
By filtering radiated heat, a novel microstructure of crisscrossed tungsten beams promises to improve the efficiency of light bulbs and of heat-to-electricity conversion devices.
- Health & Medicine
Freeing up the mouse genome
Scientists have assembled the DNA sequences from a strain of the common lab mouse and made the draft genome available for free over the Internet.
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Would-be brain boosters need data lift
Research has yet to confirm that the herb Ginkgo biloba and other nonprescription nutrients enhance memory and intellect.
