Last week, the World Health Organization published a provocative model that explores the possibility of "eliminating" the HIV epidemic by annually testing everyone on a voluntary basis and treating all infected people, regardless of their clinical status

The axolotl, a salamander that retains unique evolutionary features and is a darling of biologists because it can regenerate limbs, faces adversity on two fronts  

Weaving materials science and biology together, researchers are drawing closer to the elusive goal of recreating tissues that do the body's work, such as cartilage and muscle