Uncategorized
- Earth
Dioxin-type carcinogens pose additive risks
Pollutants known as dioxins, furans, and certain chemically related polychlorinated biphenyls have additive cancer-causing effects when mixed together, as has been assumed in calculating the chemicals' health risks.
- Astronomy
Renegade stars in sun’s neighborhood
Some stars in the neighborhood of the sun may be renegades from the center of our galaxy.
- Health & Medicine
Childhood trauma raises risk of heart disease
A childhood filled with psychological or physical tribulations contributes to one's risk of developing heart disease as an adult.
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19474
After reading this article, I noted that nowhere in the article’s text was it stated how the hydrogen is going to be stored. Storing hydrogen safely and economically is difficult, to say the least. David E. BeesonWinona Lake, Ind.
- Chemistry
Solar Hydrogen
With the vision of a hydrogen economy looming ever larger in people's minds, scientists have picked up the pace of their pursuit of materials that use solar energy to split water and make clean-burning hydrogen fuel.
- Math
Squaring Circles
Cutting a circle into pieces and reassembling the fragments to form a square is a tricky proposition.
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19473
In this article you wondered, “Should gene enhancement, or doping, be permissible for athletes attempting to improve their performance?” Sure, but in separate competitions. Athletes would register as either “doped” or “clean.” The problem with doping is not the doping, it’s the cheating. Sam CoxLoveland, Colo.
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Gene Doping
Inserting genes for extra strength or speed could give athletes an unbeatable, and perhaps undetectable, advantage in competitive sports.
- Math
Young Gauss
Mathematical anecdotes don't always tell the whole truth and nothing but the truth.
- Humans
Letters from the October 23, 2004, issue of Science News
Hand to mouth “Skin proves poor portal for arsenic in treated wood” (SN: 7/24/04, p. 62: Skin proves poor portal for arsenic in treated wood) shouldn’t make parents any less wary of allowing their children to come in contact with the chromated-copper arsenate wood structures. What children pick up on their hands from a deck […]
- Computing
Net History
Nethistory.info is a new Web site devoted to the history of the Internet. Its aim is to provide material documenting the applications and platforms that came together to create the early Internet, including protocols, personal computers, e-mail, the World Wide Web, networks, and much more. You can sign up for a free monthly newsletter and […]
- Humans
From the October 20, 1934, issue
Searching New York's East River for golden treasure, enormous canyon discovered in Mexico, and new radioactive elements predicted.
