1. KEEPING TIME 生物钟仍在运行

You might be asleep but your hypothalamus is not. It's carefully keeping time for you as part of your circadian rhythm. This not only helps you feel tired so that you go to sleep with the release of melatonin, but a protein called PER is released in the morning that gradually wakes you up, often right before your alarm clock is set to go off.

你也许睡着了，但你的下丘脑没有睡。它还在一丝不苟地运行着生物钟。下丘脑会分泌褪黑激素，让你感到困倦，到了早晨，则会释放一种名为PER的蛋白质，让你逐渐苏醒，通常会在闹钟快响的时候把你叫醒。

2. SPOUTING OFF 说梦话

What do you have to say when you're asleep? Sleep-talking or somniloquy can range from random noises to complete sentences. About 5 percent of adults do it (it's slightly more common in children), and it can happen during any stage of sleep. It's most common in men and kids, and can be brought on by fever, sleep deprivation, stress, anxiety, or depression. Don't worry though—there's no evidence people tell their deepest, darkest secrets while asleep. The biggest concern may be that you're keeping your sleep partner awake.

当你沉睡的时候你会说什么呢？梦话可能是语焉不详的呢喃，也可能是完整的句子。大约5%的成年人会说梦话（小孩说梦话更常见一点），而且在睡眠的任何阶段都可能说梦话。男人和孩子说梦话最多见，可能是由发烧、缺觉、压力、焦虑或抑郁引起。不过不要担心——没有证据表明人们会在睡梦中说出自己藏得最深、最阴暗的秘密。最令人烦恼的恐怕是说梦话会把一起睡觉的人吵醒。

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