Every year, millions of lives are suddenly, swiftly transformed by a stroke, which occurs when a blood vessel traveling towards the brain becomes obstructed, causing neurons to die off. Strokes are ...

For years, most of us were taught in school that the brain cannot grow new cells once they are lost. But modern neuroscience is rewriting that narrative. Research now shows that adults can, in fact, ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. Billions of nerve cells send signals coursing through our bodies, serving as conduits ...

Some parts of our bodies bounce back from injury in fairly short order. The outer protective layer of the eye—called the cornea—can heal from minor scratches within a single day. The brain is not one ...