ScienceInsights

Tracts are bundles of nerve fibers in the brain and spinal cord that carry sensory and motor signals. Learn what they do and what happens when they're damaged.

Walking desks do burn extra calories, but the weight loss results are modest. Here's what the research actually shows.

Thinking about a nipple piercing? Here's what to expect from pain and healing time to infection signs, nerve changes, and breastfeeding considerations.

Blind people rely on internal clocks, social cues, and routines to track time. Here's how the brain manages sleep without visual light signals.

Practical pumping strategies to help boost your breast milk supply, from session frequency and power pumping to flange fit and nutrition tips.

Chewing gum might build jaw muscles, but it also risks TMJ pain and facial aging. Here's what science says about gum and your jawline.

Bright red or dark blood when wiping usually points to hemorrhoids or a fissure, but color and symptoms can help you know when to see a doctor.

Scientists have long debated whether orgasms help conception. Here's what the research actually shows about sperm retention and fertility.

THC passes into breast milk and lingers for days. Here's what the research shows about risks to infants and why experts advise against it.

Orgasm intensity depends on factors like pelvic floor strength, brain chemistry, blood flow, and mental state — here's what the science says.