Pasteur Institute

(Newser) - The Ebola virus is mutating "quite a lot," according to scientists tracking the outbreak in West Africa—but the tough part is telling just what it is mutating into. It is important to track genetic changes to "keep up with our enemy," a geneticist at France'...

(Newser) - The HIV/AIDS epidemic exploded in the 1980s, but new research shows HIV was plaguing the human population in Africa for a century before that. Old collections of human tissue samples from the Congo have produced evidence of old strains of HIV that may have emerged in 1908, reports Nature.

(Newser) - The number of fat cells is set for a lifetime in childhood, a new study indicates. The latest research into obesity reveals fundamental new insights into why some people become fat and why it is so hard for overweight people to keep excess pounds off—even after a successful diet,...