The liver supports chemical digestion by producing bile, which breaks down fats. Learn what bile does and why the liver's role goes well beyond digestion.
Several common household bugs feed on dead skin cells, from dust mites in your bedding to tiny mites living on your face. Here's what they are and how to manage them.
Severe back pain has many possible causes, from herniated discs to referred organ pain. Learn what's behind your symptoms and which signs need prompt medical care.
When cutting calories, your protein needs actually go up. Learn how much to eat based on your activity level and body weight to keep muscle while losing fat.
Lava tubes are hollow tunnels left behind by flowing lava. Learn how they form, what lives inside them, and why scientists think they could shelter future space explorers.
CT scans help doctors diagnose everything from brain injuries to cancer. Here's a look at the conditions they're most commonly used to detect and monitor.
Some UTIs can clear without antibiotics. Learn which remedies like D-mannose and uva ursi actually have evidence behind them, and when to see a doctor.