Uncategorized
- Humans
From the May 19, 1934, issue
Preparing for a stratospheric ascent, the great dust storm of 1934, and the invention of the electron microscope.
- Chemistry
Home Experiments
Collapsing a soft drink can, fireproofing a balloon, creating cool light, and bending water are among the activities offered by Bassam Z. Shakhashiri, a chemistry professor at the University of Wisconsin–Madison. His Web pages provide instructions for performing these and other experiments at home. Go to: http://scifun.chem.wisc.edu/homeexpts/HOMEEXPTS.HTML.
- Humans
Young Talent on Display: Tomorrow’s scientists and engineers win recognition, rewards
The three top winners of the 2004 Intel International Science and Engineering Fair hail from high schools on different continents.
- Earth
A Portrait of Pollution: Nation’s fresh water gets a checkup
Virtually all of America's fresh water is tainted with low concentrations of chemical contaminants, according to a new nationwide study.
- Materials Science
Branching Out: Semiconducting nanotrees could boost electronics
Forests of semiconducting nanotrees could form the basis of future solar cells, low-energy lighting, and other optical or microelectronic devices.
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Breeds Apart: Purebred dogs defined by DNA differences
The most thorough DNA analysis yet of purebred dogs suggests that canine breeds can also be discerned genetically with great accuracy.
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Your article failed to include in the list of oldest dogs the Shiba Inu. This is the most popular dog in Japan today, and many of its qualities make it a much better pet than the other dogs listed in your “oldest breeds” category. Deborah Katz HuntMadison, Wis. The genetic analysis included the Shiba Inu, […]
- Plants
Wind Highways: Mosses, lichens travel along aerial paths
Invisible freeways of wind may account for the similarity of plant species on islands that lie thousands of kilometers apart.
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Pot on the Spot: Marijuana’s risks become blurrier
A research review challenges the assumption that scientists have demonstrated a causal link between teenage marijuana use and later psychological and behavioral problems.
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It seems to me that the stronger the social pressure against using marijuana in a culture, the more likely it will be that those who use it will be troubled, antisocial, or unusually independent. Hence, any increase in the incidence of mental problems after using marijuana could be attributed to an increased likelihood that those […]
- Astronomy
Old Stars Even Older: Determining a new age for the universe
Using particles accelerators to mimic the conditions inside stars, two independent research groups have found evidence that the most-ancient known stars are about a billion years older than astronomers had estimated.
- Humans
Letters from the May 22, 2004, issue of Science News
Further options “Surgical Option: Hysterectomy may top drugs for women with heavy bleeding” (SN: 3/27/04, p. 196: Surgical Option: Hysterectomy may top drugs for women with heavy bleeding) doesn’t mention that 13 to 20 percent of women with heavy menstrual periods have a common but often undiagnosed bleeding disorder called von Willebrand disease. Because this […]
