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Monday, March 17, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News


Older adults: Build muscle and you'll live longer

Posted: 14 Mar 2014 06:51 AM PDT

The more muscle mass older Americans have, the less likely they are to die prematurely, new research shows. The findings add to the growing evidence that overall body composition -- and not the widely used body mass index, or BMI -- is a better predictor of all-cause mortality. "In other words, the greater your muscle mass, the lower your risk of death," said the study's co-author. "Thus, rather than worrying about weight or body mass index, we should be trying to maximize and maintain muscle mass."

You should be ashamed -- or maybe not

Posted: 13 Mar 2014 10:43 AM PDT

Shame on you. These three simple words can temporarily -- or, when used too often, permanently -- destroy an individual's sense of value and self-worth.

New fossil species: Origin of toothed whale echolocation

Posted: 12 Mar 2014 12:01 PM PDT

A new fossil species, Cotylocara macei, shows evidence of echolocation and the complex anatomy underlying this unique behavior that has evolved in toothed whales, dolphins and porpoises. "Its dense bones and air sinuses would have helped this whale focus its vocalizations into a probing beam of sound, which likely helped it find food at night or in muddy water ocean waters," said the lead author.

Large study identifies exact gut bacteria involved in Crohn's disease

Posted: 12 Mar 2014 10:26 AM PDT

While the causes of Crohn's disease are not well understood, recent research indicates an important role for an abnormal immune response to the microbes that live in the gut. In the largest study of its kind, researchers have now identified specific bacteria that are abnormally increased or decreased when Crohn's disease develops. The findings suggest which microbial metabolites could be targeted to treat patients with this chronic and currently incurable inflammatory bowel disease.

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