Uncategorized
- Earth
Scraping the bottom
A survey of deep waters in western Lake Superior has revealed the tracks left by massive icebergs scraping bottom there during the last ice age.
- Earth
Glaciers give major boost to sea level
The ongoing disappearance of glaciers and other small ice masses worldwide makes a larger contribution to sea level rise than the melting of ice sheets on Greenland and Antarctica does.
- Earth
Dating a massive undersea slide
Pieces of moss buried in debris left along the Norwegian coast by an ancient tsunami have enabled geologists to better determine the date of the immense underwater landslide that triggered the inundation.
- Humans
Longer work hours may warm climate
U.S. workers put in more hours than most other workers around the world, and one consequence is dramatically higher energy and environmental costs per employee.
- 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.
- 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.
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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 […]
- 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’ […]
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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.
