ScienceInsights

Saline rinses, antihistamines, nasal sprays — here's what actually helps a post-nasal drip cough and how long relief takes.

Brown toenails are usually caused by fungus or bruising, but treatment depends on the cause. Learn what's behind the discoloration and how to actually fix it.

At 3 months, babies can see about 8–12 inches away and are just starting to track movement and recognize faces. Here's what's normal for their vision.

What alcohol actually does to your body and mind, from that first warm buzz to blackout — and why it hits everyone differently.

Eight evidence-based ways to calm anxiety quickly, from cold water and breathwork to supplements and medication.

400 mg of caffeine is the widely cited daily limit, but your genetics, sleep, and heart health all affect whether that amount is right for you.

Find out which foods actually fuel your workout when you only have 30 minutes to eat before training, and what's better left until after.

How often men can ejaculate in a day depends on age, refractory period, and recovery. Here's what the science actually says.

Cold drinks making you wince? Learn what's really behind tooth sensitivity and which remedies actually work.

From early symptoms to reading a faint line, learn how to recognize pregnancy signs and get a reliable result from home and blood tests.