Uncategorized
- Animals
Feral breed lacks domestic dogs’ skill
Wild dogs that haven't lived with people for 5,000 years share little of the capacity of their domesticated cousins for interpreting human gestures.
- Health & Medicine
HIV infects 1 in 100 in New York
A change in how New York City officials identify and track cases of HIV infection has yielded the clearest picture yet of how deeply rooted that city's epidemic has become.
- Health & Medicine
Primate virus found in zoo workers
Viruses related to HIV can be found in the blood of some zoo staff and other people who work with primates, although the infections don't appear to be harmful.
- Archaeology
How agriculture ground to a start
A major advance in agriculture occurred around 11,000 years ago, when western Asians began to walk through patches of wild barley and wheat and scoop handfuls of ripened grains off the ground, a report suggests.
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Blocked gene gives mice super smell
Deactivating a single gene can produce mice with an abnormally sharp sense of smell.
- Humans
Letters from the Feb. 28, 2004, issue of Science News
It’s tough in there In the arts, we say that material, such as paper, that deteriorates readily because of its composition (“News That’s Fit to Print—and Preserve,” SN: 1/10/04, p. 24: News That’s Fit to Print—and Preserve) has “internal vice.” I suppose that could be said of newspapers on several grounds. Lawrence Wallin Santa Barbara, […]
- Math
Sculpting with a Twist
There’s more than one way to slice a bagel. A bagel (or a doughnut) can serve as a physical model for a mathematical surface called a torus. You can slice it horizontally (or longitudinally) so that you end up with two halves, each containing a hole. That’s great for making sandwiches because the cut exposes […]
- Health & Medicine
Inflammatory Fat
Immune system cells may underlie much of the disease-provoking injury in obese individuals that has been linked to their excess fat.
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The genetic link from obesity to macrophage production to inflammation to diseases in this article seems convincing. On an ecological scale, inflammation is an acute response to environmental insult, while fat is a chronic response, through its role in sequestering toxins. Perhaps the new research reveals a genetic program to arm the body’s defenses both […]
- Computing
Straining for Speed
Hitting fundamental limits on how small they can make certain structures within semiconductor transistors, chip makers are deforming the silicon crystals from which those transistors are made to eke out some extra speed.
- Astronomy
Finding the star that was
Sifting through archival images, astronomers have identified the star whose explosive demise was recorded by telescopes last year.
- Chemistry
Radical molecule could produce plastic magnets
A team of chemists has synthesized an unusual organic molecule that could lead to cheaper and lighter magnets.
