Uncategorized
- Earth
Oops! Tougher arsenic rule retracted
The new EPA administrator has delayed by 60 days the implementation of a final rule issued by the Clinton administration lowering the amount of arsenic allowed in drinking water.
- Earth
How polluted we are
Most people carry traces of toxic pollutiants, including metals, pesticides, and phthalates.
- Health & Medicine
Gene linked to aggressive prostate cancer
A gene that is more active in prostate cancer tumors from African-American men than in tumors from white men may help explain why prostate cancer is both more common and more aggressive in African Americans.
- Health & Medicine
Synthetic enzyme wards off side effects
A synthetic enzyme that lowers blood pressure and causes blood vessels to constrict shows promise for treating skin and kidney cancers that have spread throughout the body.
- Health & Medicine
Gene variant linked to early puberty
A highly active version of a gene for faster testosterone metabolism is also associated with early breast development—by the age of 9.5 years—in girls.
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Quantum Art
Quantum physicist Eric J. Heller of Harvard University writes computer algorithms to convert scientific data into brilliantly colorful images. A selection of the resulting graphic images is now featured in an art exhibition titled Approaching Chaos. These Web links to Harvard Magazine and to Heller’s own Web page highlight several of these intriguing artworks. Go […]
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From the April 4, 1931 issue
PASCHAL FLOWERS BLOOM ON PRAIRIES OF THE WEST Easter-Tide is remembered in America by two names, one of a place, the other of a flower. When the youth-seeking Ponce de Leon sighted the coast of the New World it was on Easter morning, and accordingly he named the place he had found Pascua Florida, or […]
- Math
Prized Geometric Logic
Computer programs can handle all sorts of data, from sums of money in bank accounts to sensor readings from scientific instruments. In many cases, the data are a set of discrete elements, such as temperatures. Moreover, some elements of a set may be larger in value than others, or they may exhibit some other relationship […]
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Touching legs turns shy locusts gregarious
Researchers have discovered that sensing repeated touch on the hind leg triggers a shy, green locust to flip into swarming mode.
- Physics
Moon may radio cosmic rays’ biggest hits
Efforts to use the moon to detect the highest-energy cosmic rays get a boost from an experiment showing that gamma rays zipping through a giant sandbox cause the kind of microwave bursts moon-watchers are hoping to see.
- Earth
Microbes put ancient carbon on the menu
Scientists have found microorganisms within Kentucky shale that are eating the ancient carbon locked within the rock, a previously unrecognized dietary habit that could have a prevalent role in the weathering and erosion of similar sedimentary rock at many other locations.
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Bacterial cells reveal skeletal structures
The finding of a cytoskeleton in Bacillus subtilis bacteria eliminates a fundamental difference between bacteria and higher (eukaryotic) cells.
