Uncategorized
- Animals
Well-Tuned Bats: These animals are what they hear
Two studies of bats find that neighbors can live in virtually different worlds because their echolocation calls are tuned to detect different prey.
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Genetic Pickup: Did animals get brain genes from bacteria?
Genes that make brain chemicals may have been acquired from bacteria.
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Setting a Stage for Cancer: Another reason for women not to drink while pregnant
Drinking alcohol during pregnancy can cause a range of birth defects in newborns, and researchers have now shown that, in rats, it also increases the risk of breast tumors in adult offspring.
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A Fetching Lexicon: Language clues come from dog’s vocabulary
A research team finds that a 9-year-old border collie displays a keen facility for learning word meanings, providing new support for the theory that simple types of thinking practiced by some nonhuman animals also make word learning possible in toddlers.
- Physics
Corralling the Mass Maker: Hunting ground shifts for elusive particle
Hunters of the most eagerly sought particle in high-energy physics, the Higgs boson, are gleaning fresh clues about where and how to look from a new finding about another fundamental particle called the top quark.
- Physics
Light Projects
This colorful, interactive Web site provides a lively introduction to the nature of light and spectra. A product of Project LITE (Light Inquiry Through Experiments) at Boston University, the site offers a variety of applets, activities, and materials on topics ranging from color mixing and afterimage effects to moire patterns and geometrical optics. A fascinating […]
- Humans
Letters from the June 12, 2004, issue of Science News
Go with the flow In “Tales of the Undammed: Removing barriers doesn’t automatically restore river health” (SN: 4/10/04, p. 235: Tales of the Undammed), the photo comparison of the dam site is deceptive because the two photos of the same spot appear to have been taken during different seasons. Hence, the lower photo shows a […]
- Tech
DNA puts its best foot forward
A robot made of DNA has taken its first steps, suggesting that such devices could eventually be used for nanoscale manufacturing.
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Chimp DNA yields complex surprises
A molecular comparison of chromosome 22 in chimpanzees with its counterpart in people reveals surprisingly complex genetic differences between the two species.
- Health & Medicine
Green tea takes on poison
Green tea contains a broad range of compounds that detoxify dioxin.
- Tech
Microwave mirror hits the spot
A technique for rebounding and refocusing sound also works for electromagnetic waves, possibly opening new uses ranging from improving cell phone communication to treating illness.
- Health & Medicine
Americans eat faster, and more
More and more people are eating at fast-food restaurants, and they down significantly more calories on the days they do.
