Uncategorized
- Chemistry
For sweat’s sake
Soldiers and emergency crews may one day find comfort as well as safety in their chemical-protection gear, now that researchers have created a breathable, chemical-blocking composite material.
- Ecosystems
Most Bees Live Alone
Concern about honeybee shortages has inspired new interest in bees that lead solitary lives and don't bother storing honey.
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19775
The statement in the article that astronomers “don’t yet have” a probe to journey to the vicinity of a black hole is puzzling. As far as I know, the closest known black hole is V4641, more than 1,500 light-years away. Given that, the implied assumption that a probe will someday be able to reach a […]
- Astronomy
A New Spin
Using a flotilla of spacecraft to study X-ray emissions from the vicinity of black holes, astronomers are nudging ever closer to the whirlpool of activity surrounding these gravitational monsters.
- Math
The Coin in the Cake
Hiding a coin in a cake offers a lucky slice and a tantalizing math problem.
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Visions of Infinity
Tiling a hyperbolic floor inspires both mathematics and art. Go to: Visions of Infinity
- Humans
From the December 19 & 26, 1936, issues
CHRISTMAS HOLLY TREES HAVE THEIR FLOWERS TOO Despite the popularity of the familiar red holly berries for Christmas decorations, few of us are familiar with the rare beauty of the holly tree’s flower. The illustration on the front cover of this week’s Science News Letter is one of the superb enlargements in Walter E. Rogers’ […]
- Tech
Ahead of the Curve: Novel morphing wing may reduce aircraft’s fuel use
A prototype aircraft wing has demonstrated in its first flight tests that its morphing might save fuel.
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19774
I haven’t seen any reference to the similarity between the “morphing” wing in this article and the “warping” wing that the Wright brothers used on their gliders and powered aircraft. It seems we’ve come full circle in our quest to emulate the flight of birds. Paul BakerBrowns Valley, Calif.
- Earth
Irony on High: Global warming cools, thins upper atmosphere
Increasing concentrations of carbon dioxide and other greenhouse gases in the air, which cause temperatures at Earth’s surface to warm, will turn the upper layers of the atmosphere cooler and thinner in coming decades, new research suggests. This counterintuitive phenomenon, first predicted in the late 1980s and recently inferred from satellite data, will probably lead […]
- Planetary Science
The Big Picture: Cassini spies Titan’s tall mountains
A spacecraft has discovered the largest mountains known on Titan, Saturn's smog-shrouded moon.
- Health & Medicine
AIDS Avoidance: More studies find that circumcision deters HIV
Two large trials in Africa find that male circumcision limits HIV infection, which could prompt governments on that continent to promote or subsidize the operation.
