Uncategorized
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19440
While heart disease victim Jody Gorran’s lawsuit against the Atkins empire will be decided in court, the deadlier battle is being waged in the research laboratory. Several studies confirm that low-carbohydrate diets cause marked cholesterol elevations for many individuals. In contrast, a vegetarian diet high in soluble fiber and soy protein can lower serum cholesterol […]
- Health & Medicine
Counting Carbs
Although low-carbohydrate diets can be powerful weight-loss tools, many physicians now conclude they aren't for anyone who isn't under a doctor's watchful eye.
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- Humans
From the July 7, 1934, issue
Fireworks in Fairyland, controlling the sex of warm-blooded animals, and deadly atmospheres on Jupiter and Saturn.
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19439
In the close-up from the Cassini spacecraft, some of Saturn’s rings look rather like grooves in a phonograph record. I wonder if anyone has tried mapping those grooves to see if they can be played using the method described in “Groovy Pictures: Extracting sound from images of old audio recordings” (SN: 5/29/04, p. 339: Groovy […]
- Planetary Science
Titanic Images, Groovy Shots: Cassini arrives at Saturn
After a 7-year, 3.5-billion-mile journey, the Cassini spacecraft last week slipped through a gap between two of the icy rings circling Saturn and became the first spacecraft to orbit the distant planet.
- Earth
City Heat: Urban areas’ warmth affects plant growth
Satellite observations of eastern North America show that plants in and around urban areas bud earlier in the spring and retain their foliage later in the fall than do plants in nearby rural settings.
- Agriculture
Plastic vs. Plants: Mulch method changes tomato’s gene activity
A suite of at least 10 genes in a tomato plant behaves differently depending on the farmer's mulch-and-fertilizer routine.
- Anthropology
Living Long in the Tooth: Grandparents may have rocked late Stone Age
A new analysis of fossil teeth indicates that the number of people surviving long enough to become grandparents dramatically increased about 30,000 years ago.
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19438
The counterintuitive finding that atrazine is more likely to kill tadpoles when it is highly diluted reminds me of a similar phenomenon in the alternative health care practice of homeopathy. Tracy SellersRowlett, Texas
- Earth
Just a Tad Is Too Much: Less is worse for tadpoles exposed to chemicals
The herbicide atrazine is more likely to kill developing amphibians when it is highly diluted than when it's much more concentrated in aquatic environments.
- Physics
Grainy Geyser: Tall squirts reveal sand’s liquid ways
Dropping a steel ball into fine, loosely packed sand produces towering jets of grains.
