Dec 16, 2014

Ancient DNA reveals history of horse domestication

Speed, smarts, and the heart of a champion: using genomic analysis, scientists have identified DNA changes that helped turn ancient horses such as those in prehistoric cave art into today’s Secretariats and Black Beautys, researchers reported Monday. Understanding the genetic changes involved in equine ...

Dec 2, 2014

HIV may evolve to cause AIDS less frequently

HIV may be evolving to become less aggressive, suggesting that one day it may infect humans without causing AIDS. Women with HIV in South Africa are more likely to have AIDS than a similar group in Botswana, where the disease arrived a decade earlier. ...

Artificial sweeteners seen boosting diabetes risk

Sep 18, 2014

Artificial sweeteners seen boosting diabetes risk

Promoted as an aid to good health, artificial sweeteners may in fact be boosting diabetes risk, said a study Wednesday that urged a rethink of their widespread use and endorsement. Also called noncalorific artificial sweeteners, or NAS, the additives are found in diet sodas, ...

Aug 7, 2014

Study ties new gene to major breast cancer risk

It’s long been known that faulty BRCA genes greatly raise the risk for breast cancer. Now scientists say a more recently identified, less common gene can do the same. Mutations in the gene can make breast cancer up to nine times more likely to ...

Oct 9, 2013

No-go zone bulls' sperm count said OK

The testicles and the sperm counts in bulls abandoned in the evacuation zone around the battered Fukushima No. 1 nuclear plant have so far not been affected by chronic exposure to radiation, an academic study has found. The finding provides crucial data to scientists ...

Sep 25, 2013

Stroke risk for heavy-drinking women at least double: study

Women who drink heavily are at a 2.3 times greater risk of suffering strokes than those who drink only occasionally, scientists reported Wednesday. The researchers, from the National Cancer Center and Osaka University, surveyed some 47,000 women across Japan from 1990 to 2009 for ...