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19812
Reading this article, I was struck by the similarity between the image that used a cone-shaped mirror and the images you get from gravitational lensing. As the same data are available in both types of images, it ought to be possible to process gravitationally imaged objects in a way to reconstruct their 3-D shapes under […]
- Tech
Pictures Posing Questions
Radical new forms of photography use computation to transcend the limits of traditional cameras.
- Humans
Letters from the April 7, 2007, issue of Science News
Winter wonders The theory of “nuclear winter” was originally put forward by an Eastern European mathematician in the 1980s (“Sudden Chill,” SN: 2/3/07, p. 72). Some months later, it was shown that an error in his original calculations so vastly exaggerated “nuclear winter” as to make it meaningless. Still, the dramatic concept of a “nuclear […]
- Math
Math Circles Inspire Students
Programs outside of school are helping students discover math on their own.
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The Billion Tree Campaign
The United Nations Environment Programme has launched a major global tree-planting campaign to encourage people, businesses, and governments to enter tree-planting pledges online. The effort’s objective is to plant at least one billion trees worldwide during 2007. Go to: http://www.unep.org/billiontreecampaign
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- Earth
Pollution Fallout: Are unattractive males Great-gram’s fault?
Pollutant exposures in rodents can have behavioral repercussions that persist generation after generation.
- Tech
Is Your Phone Out of Juice? Biological fuel cell turns drinks into power
A new type of fuel cell uses natural enzymes to produce small amounts of electricity from sugar.
- Animals
Too Few Jaws: Shark declines let rays overgraze scallops
A shortage of big sharks on the U.S. East Coast is letting their prey flourish, and that prey is going hog wild, demolishing bay scallop populations.
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Family Feud: Genetic arms race between parents benefits male offspring in a surprising way
A gene in mice that benefits the father at the mother's expense appears to help offspring of both sexes.
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Bipolar Surprise: Mood disorder endures antidepressant setback
Severe depression in patients with bipolar disorder responds no better to a combination of antidepressants and mood-stabilizing drugs than to mood stabilizers alone.
- Astronomy
Late Bloomer: Hubble studies once-dormant galaxy
A wispy dwarf galaxy called Leo A has the potential to change the way astronomers build theoretical models of galaxy evolution.
