Uncategorized
- Humans
Letters from the March 3, 2007, issue of Science News
Up, down, around I haven’t seen any reference to the similarity between the “morphing” wing (“Ahead of the Curve: Novel morphing wing may reduce aircraft’s fuel use,” SN: 12/23&30/06, p. 406) and the “warping” wing that the Wright brothers used on their gliders and powered aircraft. It seems we’ve come full circle in our quest […]
- Health & Medicine
Cocoa compound increases brain blood flow
Cocoa that retains compounds usually removed to soften the product's flavor can significantly improve blood flow to the brain.
- Earth
Subglacial lakes may influence ice flow
The flow of water into and out of massive, ice-covered lakes in Antarctica may influence the speed at which the overlying glaciers move toward the sea.
- Health & Medicine
A cornea that’s got some nerve
Researchers have developed a technique to grow corneal tissue that includes nerve cells, an advance that may enable them to test consumer products in lab dishes rather than live animals.
- Health & Medicine
Fungus produces cancer drug
Several varieties of fungi that attack hazelnuts produce high quantities of the popular cancer drug paclitaxel.
- Physics
Breaking a molecule’s mirror image
The theory of entanglement explains a newly observed behavior in a symmetrical hydrogen molecule: When the molecule fractures, the directions in which its constituent particles move are not always random.
- Health & Medicine
How antipsychotic drugs can cause weight gain
A study of mice has identified a biological mechanism by which medications called atypical antipsychotics cause people to gain weight.
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19799
This article reports on new age dates for Clovis sites. It may be of interest to your readers that the dates given (11,050 to 10,900 years ago) are in “radiocarbon years” and are not in real or “calendar years.” As a result of variations in the production of carbon-14 in the atmosphere through time, radiocarbon […]
- Anthropology
New age for ancient Americans
New radiocarbon dates indicate that the Clovis people, long considered the first well-documented settlers of the New World, inhabited North America considerably later and for a much shorter time than previously thought.
- Chemistry
Lighting up for uranium
A portable sensor could make it possible to rapidly detect environmental uranium contamination.
- Animals
Science behind the Soap Opera
Tight family groups of meerkats in Africa's arid lands offer a chance to see the costs, as well as the charms, of cooperation. With audio.
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19798
Your article shows that meerkats bear an uncanny resemblance to human beings. We, too, have an innate sense of responsibility for our group and individually commit acts of unspeakable violence. John HagerhorstFrederick, Md.
