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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Get High, Don’t Cheat?
20 November 2013 4:45 pm
Infidelity is rife throughout the animal kingdom, but much remains unknown about why levels of such promiscuity can vary widely across and within species. Now, scientists find whether female sparrows cheat on their mates can depend on the altitude. The researchers analyzed 24 populations of 12 species of sparrows, including the white-crowned sparrow (pictured), ranging across more than 3000 meters of elevation. They discovered the higher the sparrows nest, the more faithful females can be, the researchers report in January in The American Naturalist. The investigators suggest that higher altitudes are more physically demanding, so females stay faithful to keep mates around to provide fatherly aid that can help their young survive.