daylight saving time

If you're not a morning person or a night person, but more like a midday person, don't feel left out.

Scientists have yet to find a truly sleepless creature. But is sleep really necessary for survival?

A new study may have uncovered why a poor night's sleep is bad for your heart and blood vessels.

How did people wake up before the invention of modern alarm clocks?

A new, limited-time-only burger at Burger King has a peculiar selling point: It's supposed to give you nightmares.

Without these genes, there's no REM sleep.

Doctors have a very good reason for this recommendation.

Sleep deprivation could contribute to loneliness, and the feeling is "contagious," researchers say.

Here's what you should know about sleeping with a fan on at night.

In waking life, such a case of quickly forgetting recent experiences would surely land you in a doctor's office. With dreams, however, forgetting is normal. Why?