Researchers delving into genetics, social networks and animal behavior are discovering how friendship affects our health and well-being—and how it played a part in our evolutionary story
A long-overlooked system of nerves that respond to gentle strokes may be crucial to our ability to form connections with one another
New methods for growing and transplanting cells offer hope for treating Parkinson’s and other degenerative diseases
Stem cell therapy is emerging as a promising treatment for Parkinson's disease
Playing violent video games can sharpen our focus, reasoning and decision-making skills. But do we really need the weapons?