Melatonin

If you wake up at 3 a.m. and suddenly feel wide awake, your first instinct might be to panic. Modern sleep culture has convinced many people that healthy rest must happen in one uninterrupted eight-hour stretch, so waking in the middle of the night often feels like a sign that something is wrong. But history …

Most people reach for an extra blanket when temperatures drop. Warmth feels intuitive, comforting, and necessary for a good night’s rest. Yet sleep researchers have spent years building a case against that instinct, and their findings might change how you think about your thermostat. Something happens when you lower your bedroom temperature. Your body responds …