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19376
In regards to the picture accompanying this article, it might be helpful to remind readers that such colorful depictions of nanoscale materials are slightly fanciful. These structures exist in realms so small that visible light, and therefore color, has little meaning. James HedbergPortland State UniversityPortland, Ore.
- Materials Science
Pumping Carbon: Researchers watch nanofibers grow
The first atomic-scale movies of carbon nanofiber growth show particles of a metal catalyst pulsating wildly while carbon and metal atoms scuttle across the particle’s surface.
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19297
I’m confused. This article says that “atherosclerosis isn’t linked to oxidation of bad cholesterol.” If not, why does the article “Telltale Charts” (Telltale Charts) name cholesterol as one of the traditional risk factors? What is really going on with cholesterol? Sandor FrecskaLancaster, Pa. Good question. While epidemiological studies offer compelling evidence that blood-cholesterol concentrations influence […]
- Health & Medicine
Wine Surprise: Heart-protective effect is independent of antioxidants
Two studies in mice suggest that, if wine protects against heart disease, it's probably not because of the antioxidants that the drink contains.
- Health & Medicine
Good to the Bone: Strontium compound prevents some fractures
An experimental drug containing strontium makes bones denser and decreases the risk of fractures, a study of elderly women finds.
- Planetary Science
Red Planet Roundup: Opportunity knocks; Spirit revives
The NASA rover Opportunity bounced onto an equatorial Martian plain early on Jan. 25 and found an intriguing outcropping of rocks on the other side of the planet from where its ailing but recovering twin, Spirit, had recently stalled.
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- Materials Science
Flexible E-Paper: Plastic circuits drive paperlike displays
In a major step toward electronic paper, researchers have made electronic-ink displays on flexible plastic sheets.
- Physics
Skipping stones 101
Using their own stone-skipping machine, physicists have found what may be the best angle for a rock to hit the water in order to achieve the most skips.
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Juggling takes stage as brain modifier
Marked volume increases occur in visual areas of the brain as people learn to juggle and then are partly reversed when the budding jugglers stop practicing their newfound skill, a brain-scan investigation finds.
- Physics
New signs of shadow particles
The influence of as-yet-undiscovered heavy particles outside of today's prevailing theory of particle physics may have accelerated the rate at which subatomic muons wobbled in a recent experiment.
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Growth factors make an egg grow up
Scientists have identified growth factors that enable a female mammal's eggs to mature.
