Uncategorized
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Sweet Gatekeeper: Receptor depends on sugar and water
Water and sugar molecules play a previously unsuspected role in the way that a ubiquitous receptor passes chemical messages between cells.
- Health & Medicine
Grim Reap Purr: Nursing home feline senses the end
A nursing home cat in Rhode Island knows when the end is nigh, predicting with uncanny accuracy when residents will die.
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19863
Oscar the cat possibly does identify dying patients, but this story presents anecdotal rather than scientific evidence and does not belong in a science magazine. Julie EnevoldsenSeattle, Wash. Correlation is not causation. Could it not be that, somehow, Oscar the cat is killing these patients? Jan SteinmanSalt Spring Island, British Columbia
- Materials Science
Sop Story: New porous gel soaks up heavy metal
A new porous gel efficiently removes mercury from contaminated water and may also have the ability to catalyze chemical reactions such as those that generate hydrogen for fuel.
- Earth
Stunting Growth: Ozone will trim plants’ carbon-storing power
Increasing ground-level ozone due to pollution will stifle the growth of vegetation in many regions, accelerating the buildup of planet-warming carbon dioxide in the atmosphere.
- Health & Medicine
Good Light: Sun early in life could protect against MS
Childhood exposure to direct sunshine may protect people against developing multiple sclerosis later.
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Weighting for Friends: Obesity spreads in social networks
Obesity spreads as a social contagion through networks of friends and relatives, apparently because associating with overweight people encourages a laxer attitude toward weight gain.
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19862
People don’t need another reason to shun fat people. This group represents the last scapegoat for righteous discrimination in our image-obsessed society. There are myriad reasons a person becomes obese. Friendship is not one of them. Shawn DehneLittleton, Colo. As such studies progress, it will be interesting to learn if the opposite—weight loss—is also influenced […]
- Math
A Twist on the Möbius Band
The twisted, single-sided loop known as a Möbius band, when made from a stiff material such as paper, takes on a complicated shape that researchers have finally calculated.
- Humans
Universities seek armchair astronomers
Scientists are recruiting online help from the public to classify the shapes of 1 million galaxies in never-before-viewed photographs.
- Humans
Letters from the July 28, 2007, issue of Science News
Gyro Q & A Doesn’t “Spinning into Control” (SN: 05/19/07, p. 312) on flywheels leave out a significant aspect: the gyroscope effects of a rotating large mass? Wouldn’t it be a benefit for moving installations (stabilization) and a problem for immobile installations? Lee HukillPalo Alto, Calif. In the article, the flywheels depicted appear to have […]
- Health & Medicine
Perception is longevity
Mice lived longer when they were fooled into sensing lower insulin levels than they actually had.
