Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. January 28, 2026 Add ...

Pattern formation is the developmental process by which cells acquire different identities, depending on their relative spatial positions within the embryo. Pattern formation ensures that tissues and ...

One of the greatest health debates of our time: How many steps are you supposed to get in a day? We know now that the 10,000 steps rule is an outdated marketing-tool-turned-fitness-platitude—but what ...

Patchwork quilts are everywhere right now. You see them in home stores, on bedding displays, and across Instagram feeds that lean heavily into nostalgia. I get why people love them. They feel ...

Walking is incredibly beneficial for your body and brain. A recent study published in October showed that UK adults who managed to hit their daily step goals by going on a daily walk had lower health ...

Light sleep is the beginning of your sleep cycle and your body's way of winding down. Breathing, heart rate and muscle changes prepare your body for the deeper sleep to come. Light sleep is broken ...

Leukocytosis is when you have a higher-than-normal number of white blood cells. White blood cells, also called leukocytes, are important for making sure your body stays healthy. They protect it from ...

The fight-flight-freeze response is an automatic stress response that protects you from perceived threats by helping you fight, flee, or stay still. Adrenaline and cortisol trigger fast body changes ...