Sleeping a solid 8 hours isn't the whole story and the quality of your sleep might matter more. But what does sleep quality ...

The discovery, made by a team primarily from the University of Tsukuba and published in the British scientific journal Nature on Dec. 8, provided some answers to an age-old question: Why do living ...

We sleep for a third of our lives and there are many restorative processes going on during sleep that are needed to stay healthy. Why do we usually sleep at night? What happens when we don't sleep?