Researchers at Stanford University have found that the light from your monitor right before bed is enough to reset your whole wake/sleep cycle -- and postpone the onset of sleepiness by three hours.

• 斯坦福大学的研究者们发现睡前显示器发出的光的强度就足以重置“一个完整的生醒-睡眠周期”从而推迟睡意达三小时。