All Stories
- 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.
- Health & Medicine
On Wheat and Weaning
Prolonged breastfeeding appears to offer some babies major intestinal benefits, a new Swedish study finds. The practice prevented or at least delayed the onset of celiac disease in children. This intestinal disorder tends to run in families, especially those with a northern-European background. In the United States, roughly one in every 250 Americans develops the […]
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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.
- Astronomy
More evidence for a revved-up universe
By studying the clustering pattern of galaxies, astronomers have obtained additional evidence that cosmic expansion is accelerating.
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19062
In this article, it struck me that the helicopter lander’s blades might be helped considerably by their undersides’ being dimpled like a golf ball. Those dimples supply significant lift during a ball’s flight. The helicopter wings would seem to benefit in the same way. I suspect that the dimples near the outer radius might be […]
- Tech
Bugs on Mars
Undaunted by the hurdles on flight posed by thin air and a lack of oxygen, aerospace engineers are devising extraordinary flying machines resembling giant insects and windmills to make the exploration of Mars more rapid and effective.
