ScienceInsights

Fear of the dark is a deeply wired survival response, not a childish quirk. Here's what's actually happening in your brain when the lights go out.

Fistulas can develop from infections, Crohn's disease, childbirth complications, and more. Learn what causes them and how they're diagnosed.

UVA labeling on sunscreen is regulated differently by the FDA, EU, and Asian markets—here's what those labels actually mean for sun protection.

Spotting every two weeks can stem from ovulation, low progesterone, birth control, or other causes. Here's how to tell what's behind your pattern.

Chest straps measure heart rate more accurately than wrist sensors and can track running form too. Here's how they work and who actually needs one.

Flashbacks of events that never happened can feel unsettling, but false memories have real neurological and psychological explanations — and ways to manage them.

Postpartum aging is real — from hormonal shifts to nutrient loss, here's why your skin and hair change after having a baby and how long recovery takes.

Progestin can reduce or stop your period, but results vary by method. Here's what to realistically expect from the pill, shot, implant, and IUD.

Bird beaks are living structures shaped by genetics, diet, and evolution. Here's how they form, function, and can even be repaired.