World / Science & Health 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 domestication, ...

World / Science & Health 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. The ...