All Stories by Science News
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19844
Your article reports 86 heart attacks among 15,560 rosiglitazone (Avandia) users, versus 72 others in a control group of 12,283. A study coauthor then says that “after statistical adjustment, that yields a 43 percent higher risk of heart attacks among rosiglitazone users.” Simple arithmetic would seem to indicate it was the control group that had […]
- Humans
Letters from the June 23, 2007, issue of Science News
Bad start In “Violent Justice: Adult system fails young offenders” (SN: 4/21/07, p. 243), an association is found between young offenders being tried as adults and increased criminal offenses later. The implication is made that one thing causes the other. Perhaps a better interpretation of the data would be that, because not every young offender […]
- Humans
From the June 12, 1937, issue
Waterflow downstream of a dam, the shape of an asteroid, and connections between wallpaper patterns and crystal structures.
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The Green Guide
National Geographic’s Green Guide offers objective information and practical advice to consumers on how to lead a greener life. Go to: http://www.thegreenguide.com
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19843
Your article states, “Exercise, estrogen, [and more examples] all rev up production of new brain cells.” I am compelled to ask: If estrogen leads to neurogenesis, does the “male” hormone testosterone also? Jaime HunterMesquite, Texas There’s good evidence that testosterone increases neurogenesis in songbirds but little evidence that it does the same in mammals. —B. […]
- Humans
Letters from the June 16, 2007, issue of Science News
Bigger picture Reading “Pictures Posing Questions: The next steps in photography could blur reality” (SN: 4/7/07, p. 216), I was struck by the similarity between the image that used a cone-shaped mirror and the images you get from gravitational lensing. As the same data are available in both types of images, it ought to be […]
- Humans
From the June 5, 1937, issue
All lit up in Paris, changing elements, and cheap, accurate lenses.
- Humans
Scitopia.org
This new site is a search portal to the digital libraries of leading science and technology societies. Enter a term into its search engine to find authoritative research, patents, and government documents. Go to: http://www.scitopia.org
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19842
This article states, “The most likely sea route ran north of Hawaii and down America’s Pacific coast.” The Polynesians were master mariners, so anything is possible, but continuing east from Tonga to South America is an extension of the main voyaging area, whereas Hawaii is well off this beaten path. Tom MallardPhoenix, Ariz.
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19841
People get excited about the birds and bats killed by 400-foot windmills planted in their flyways, but the average wind speed should also be considered. In our region, the wind speed averages 11 to 12 miles per hour, but the windmills are most efficient where winds are 30 mph. Unfortunately, many regions with good wind […]
- Humans
Letters from the June 9, 2007, issue of Science News
Safe passage I have to ask you to remove the subtitle “Dangerous Bridge” under the photograph of the exit ramp from the New Jamarat Bridge in Saudi Arabia (“Formula for Panic: Crowd-motion findings may prevent stampedes,” SN: 4/7/07, p. 213). There has never been an accident on that ramp, and the bridge is now being […]
- Humans
From the May 29, 1937, issue
An ancient Miss America, an indivisible neutron, and crystallized catalase.
