News
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Infected butterflies reverse sex roles
In butterfly populations afflicted by male-killing bacteria, females gather in frantic swarms to mate.
By Susan Milius -
Mass illness tied to contagious fear
Researchers have linked a recent outbreak of illness at a Tennessee high school to psychological factors rather than toxic gas exposure, as originally suspected.
By Bruce Bower - Health & Medicine
Nerve cells of ALS patients harbor virus
Fragments of viral genetic material show up with unusually high frequency in nerve tissue of patients with ALS, or Lou Gehrig's disease, suggesting a link between the virus and this lethal illness.
By Nathan Seppa -
For geneticists, interference becomes an asset
A new method of disrupting genes, called RNA interference, works in mouse cells.
By John Travis - Astronomy
X-ray Data Reveal Black Holes Galore
Using a sensitive, new X-ray telescope, astronomers have identified the origin of the high-energy part of the X-ray background and found that supermassive black holes at the cores of galaxies are far more numerous than visible-light surveys indicate.
By Ron Cowen - Humans
Solar series wins award for Science News
The Solar Physics Division of the American Astronomical Society has given its 2002 popular writing award to Ron Cowen and Sid Perkins for a two-part series on cyclic variations in the sun's activity.
- Agriculture
Moos, microbes, and methane
A feed additive could reduce methane emissions from cows.
By John Travis -
Ironing out underarm odor
Chemicals that deprive bacteria of iron may improve deodorants.
By John Travis -
Bacterial genes and cell scaffolding
A bacterium may have revealed the origin of a key cell structure.
By John Travis - Astronomy
Seeing Red: A cool revival of Hubble’s infrared camera
New images provide a graphic demonstration that the Hubble Space Telescope's infrared vision has been restored.
By Ron Cowen - Health & Medicine
Efficient Germ: Human body boosts power of cholera microbe
Some genes in the cholera-causing bacterium Vibrio cholerae are activated and others are silenced when the microbe passes through the human gut, changes that make the bacterium more virulent.
By Nathan Seppa - Ecosystems
Plight of the Iguanas: Hidden die-off followed Galápagos spill
Residues of oil spilled in the Galapágos Islands in January 2001 may have caused a 60 percent decline in one island's colony of marine iguanas.
By Susan Milius