- News Home
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
- About Us
ScienceShot: Songbirds Stay Cool for Their Kids
18 October 2011 7:01 pm
Call it the bird version of yoga. Red crossbills (Loxia curvirostra), small, yellow-breasted songbirds hailing from the western United States, keep mellow for the sake of their offspring. During chilly months when the living gets tough, reproductively active crossbills tend to have fewer stress hormones—or corticosterones—churning through their veins than their nonrambunctious counterparts, researchers report online today in Biology Letters. This absence makes sense: Stress hormones can give critters a survival edge by, for instance, helping birds and other animals tap their sugar stores. But this stress response is also inherently selfish. Birds with too much corticosterone often abandon their nests, leaving offspring to the elements. Crossbills may thus dampen the flow of stress hormones to ensure that their chicks survive, risking their own health in the process. If only they could learn the warrior pose.
See more ScienceShots.