Have you ever woken up right before your alarm clock goes off? You've lost those last 5 minutes of sleep and wonder why you even set the alarm in the first place.The human brain's suprachiasmatic nucleus, a clump of nerves at the center of the brain, is in charge of the body's circadian rhythm and "loves predictability." Human bodies are efficient when they have a routine, so if you tend to go to sleep at the same time each night, and wake up at the same time, too, you might be able to ditch the alarm clock and use your body's natural instincts.
展开▼
