Ever notice how your night owl friend is always a bit moodier than your early bird buddy? Turns out there might be more to it than just morning grumpiness. Those late-night Netflix binges and midnight ...

People typically tend to be either early birds or night owls depending on when they prefer to be awake. Some people feel the most productive early in the morning, and others feel more productive late ...

Life is not so easy for my patients who are night owls. In the United States, the normative sleep schedule runs from about 11 p.m. to 7 a.m., though this varies with age, gender, geography (latitude ...