ScienceInsights

Most 7-year-olds need 9–12 hours of sleep. Learn how to tell if your child is getting enough and how to build a routine that actually sticks.

Under-skin pimples need a different approach than regular breakouts. Here's what actually helps them heal and how to stop them forming.

Learn how to safely treat a mild ingrown toenail at home, plus when it's time to see a doctor instead.

Your daily water needs depend on your weight, sex, and activity level. Learn how to find your personal hydration target and tell if you're getting enough.

From statins to newer injectables, here are the cholesterol medications doctors most commonly prescribe and how they decide which one is right for you.

Back pain at 1 week pregnant is unlikely a pregnancy sign. Learn what's actually happening in your body and when symptoms can realistically appear.

Learn when pregnancy tests actually work, why timing matters, and what can cause false negatives at any stage of early pregnancy.

THC can show up on drug tests days or weeks after use, depending on the test type, your body, and how often you consume. Here's what the science actually says.

Recurring dreams about someone usually reflect unresolved emotions or stress, not psychic signals. Here's what science says about why it happens.

Testing too early for an STI can give false results. Learn the right window periods for chlamydia, HIV, herpes, and more.