Uncategorized
- Tech
Tipping tiny scales
A prototype detector based on a tiny silicon cantilever that operates in air has achieved a 1,000-fold sensitivity boost when measuring tiny quantities of chemical agents.
- Planetary Science
Roving on the Red Planet
NASA last month selected the landing sites for rovers scheduled to begin exploring the Martian surface next January.
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“Sensing a Vibe: Seismic-alert system could give Los Angeles a few seconds’ warning” (SN: 5/3/03, p. 276: Sensing a Vibe: Seismic-alert system could give Los Angeles a few seconds’ warning) says that the S waves travel at about one-half the speed of the P waves. Then, in this article, it would appear that the P […]
- Earth
Seismic waves resolve continental debate
New analyses of seismic waves that have traveled deep within Earth may answer a decades-old question about the thickness of the planet's continents.
- Health & Medicine
Protein implicated in Parkinson’s disease
Inhibiting the natural protein cyclo-oxygenase-2, or COX-2, might help fight Parkinson's disease.
- Plants
Any Hope for Old Chestnuts?
Next year will mark the 100th anniversary of the discovery of chestnut blight in the United States, but enthusiasts still haven't given up hope of restoring American chestnut forests.
- Computing
Minding Your Business
By means of novel sensors and mathematical models, scientists are teaching the basics of human social interactions to computers, which should ease the ever-expanding collaboration between people and machines.
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19237
This article presumes that immanent-justice judgments are irrational. However, poor self-image and other psychosomatic stressors are already suspected of suppressing immunity. Many suspect that momentary emotional flare-ups precede cold and flu symptoms by a couple of days. An elaborate series of experiments might determine whether guilt over past crimes (or crime-motivating rage) made wrongdoers more […]
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Out of China: SARS virus’ genome hints at independent evolution
The newly identified SARS virus is the product of a long and private evolutionary history, clues from its genome suggest.
- Materials Science
Blunt Answer: Cracking the puzzle of elastic solids’ toughness
Rubbery materials prove tougher than theory predicts because cracks trying to penetrate those stretchy materials grow blunt at their tips.
- Materials Science
Bone Fix: New material responds to growing tissue
A new scaffolding material stimulates bone regeneration.
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Genetic Clue to Aging? Mutation causes early-aging syndrome
A gene defect that causes accelerated aging may provide insight into normal aging.
