ScienceInsights

20/20 vision is a benchmark, not perfection. Learn what it really means, how it feels day-to-day, and why eye charts only tell part of the story.

Stomach rumbling after eating is usually just gas and gut contractions at work. Learn what's behind the noise and when it might be worth checking out.

Bacterial tonsillitis becomes less contagious within 24 hours of antibiotics, but viral cases can spread for longer. Here's what to know before returning to work or school.

Waking up with a stiff neck? Learn how sleep position, pillow height, and mattress firmness affect neck pain and what small changes can help.

Physicians do more than diagnose and prescribe. Learn what their daily duties involve, how they lead care teams, and how the role is evolving.

When a stroke is suspected, hospitals run a series of fast, targeted tests — here's what they do and why each one matters.

Diclofenac can affect your stomach, heart, kidneys, and more. Learn which side effects are common, which are serious, and what influences your personal risk.

Getting pregnant on your period is unlikely but possible. Learn what affects the odds and what to do if you've had unprotected sex during your cycle.

From saline rinses to decongestants, here's what actually helps clear a stuffy nose and when it might be worth seeing a doctor.

Most people eat far more salt than recommended. Here's how much sodium your body actually needs and how to keep track of your daily intake.