The Quick Scoop: Why You Can’t Digest Milk Lactose intolerance happens when your body doesn’t have enough of the lactase enzyme to break…

Quick Answer: Eyeglasses correct vision by bending light so it focuses precisely on your retina, compensating for refractive errors like nearsightedness, farsightedness, and…

Quick Answer: Cats purr by rhythmically contracting and relaxing special throat muscles, creating gentle vibrations during both inhaling and exhaling. They do this…

Quick Answer: Hangovers happen because alcohol disrupts your body in multiple ways—your liver produces toxic byproducts, your hydration and electrolyte balance drop, your…

Growing Pains? Quick Answer Inside Your fingernails grow because a specialized area under your skin, called the nail matrix, is constantly making new…