ScienceInsights

Weightlifting burns fewer calories than cardio per hour, but intensity, body weight, and afterburn all affect the real total. Here's what to expect.

Once plaque hardens into calculus, only a dentist can remove it. Here's what that process involves and how to slow buildup between cleanings.

Smoking can raise heart attack risk faster than most people expect. Learn how cumulative exposure works and how quickly risk improves after quitting.

No official hour limit exists for teens, but research helps parents set screen time boundaries that work for 12-year-olds.

Citalopram's half-life is around 35 hours, but age, liver health, and genetics can keep it in your system much longer than you'd expect.

Feeling dizzy after sex is more common than you'd think. Here's what's actually happening in your body and when it's worth talking to a doctor.

A low heart rate isn't always a problem, but it can be. Learn what causes bradycardia, when it's harmless, and when it's worth seeing a doctor.

A clear breakdown of what Medicare Parts A and B cover, what they cost in 2025, and the gaps you should know about before enrolling.

Learn the real signs of anger issues, how they differ from normal frustration, and what you can do to manage them more effectively.

Puffy eyes are usually harmless and easy to treat. Learn which natural remedies actually reduce swelling and what habits help prevent it.