Why San Diego scientists are mapping how the brain ages

Scientists at the Salk Institute for Biological Studies in La Jolla have created a new tool to better understand how aging affects our brains. Why it matters: Aging is a major risk factor for neurodegenerative diseases like Alzheimer's and Parkinson's that affect millions of Americans. Zoom in: The tool is a detailed "atlas" of mouse brain cells that can tell researchers more about how human brains deteriorate and lose function as we age,...