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An Unexpected Role for the Brain’s Immune Cells

An important part of the brain's immune system, cells called microglia constantly extend and retract "branches" from their cell body to survey their environment.

Skip the Sleigh Ride: My Festive Fitness Fix with a 30-Minute Walking Workout

Walking is simple, at least for most of us. But it can do wonders for your mind and body.

Tribal Health Workers Aren’t Paid Like Their Peers. See Why Nevada Changed That

FALLON, Nev. — Linda Noneo turned up the heat in her van to ward off the early-morning chill that persists in northern Nevada’s high...

Blood, Types and ABO Testing

Blood groups explained, and how your blood works to provide life to your entire body. Understand donor compatibility and classification.