The Body Weight Debate
May 2, 1998 | Volume 153 | Number 18Cover: Is it a health risk to accumulate body fat as the years go by? Researchers weigh in on that question and prescribe a fitness plan for those who want to shape up.
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News of the Week:New Antibiotic Dulls Bacterial Senses
A compound that disrupts a bacterium's internal signal pathways provides a novel type of antibiotic action.
Language origins reside in skull canals
A new analysis of fossil and modern skulls, focusing on the size of a bony passage for a nerve that controls the tongue, suggests that human ancestors used spoken language as long as 400,000 years ago.
Deep coral reveal oceans fickle history
Major current patterns in the deep ocean can shift more quickly than climate researchers have long presumed.
No raccoon boom after vaccination program
A decrease in canine distemper among vaccinated city raccoons did not trigger growth of their population.
Genetic makeup can boost aspirins benefit
Some people seem to be genetically predisposed to take advantage of the anti-clotting properties of aspirin, which reduce the risk of having a heart attack.
Dolly had a little lamb
Dolly, the worlds first cloned mammal, has given birth to a lamb named Bonnie.
Sifting through the Web's data jumble
A combination of text and link analysis underlies a novel method for automatically generating lists of authoritative Web resources.
Craft eyes solar storms, hints at cooler core
An orbiting observatory has found a dozen giant tornadoes in the solar atmosphere and evidence that the suns core may be cooler than expected.
Synchrotron beam makes cells tell all
Intense infrared light provides some of the first images of the chemical components of intact, living cells.
BiologyTermites use mothballs in their nests
Formosan termites are insensitive to the naphthalene that they build into their tunnel walls.
Hunting for killer bees fury genes
Bee researchers speculate that a relatively small number of genes gives killer bees their stinging ferocity.
BiomedicineGifts come with demands, restrictions
Recipients of corporate gifts acknowledge that donors typically expected something substantial in return.
Tumor-starving drugs show promise
Drugs that starve fast-dividing, malignant cells can stop a tumor's spread.
ComputersHiding secret data in plain view
As an alternative to encryption, confidential information can be broken into segments that are tagged and inserted into a larger document.
Web searches fall short
No single seach engine indexes more than about one-third of the more than 320 million pages on the World Wide Web.
BiomedicineAntioxidants preserve lung function
Certain dietary antioxidants, such as beta carotene and selenium, appear to protect lung health.
Need a fever? Turn up the heat
Animal studies suggest that a hot environment may crank up defective internal thermostats in the elderly to fight infections.
PhysicsProbing a deuteron's structure
Even when observed on a small scale, a deuteron's structure is adequately described as a loose pairing of a proton and a neutron rather than as an assemblage of six quarks.
Rare fission processes
The unstable nucleus californium-252 can spontaneously split into two pieces without emitting neutrons.
Antiproton path to nuclear suburbs
Antiproton probes show that more neutrons than protons sit at the fringes of certain atomic nuclei.
Articles:Searching for the First Light
Long ago and far away
Resurrecting an old search method and relying on the two largest visible light and near-infrared telescopes, astronomers are detecting a slew of the most distant galaxies.
The Fat Fracas
Researchers weigh in on body size
Although obesity appears to contribute proportionately less to the death rate as people age from 30 to 74 years old, the number of deaths attributed to excess weight goes up after age 30.
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