Black Friday is a great day to sleep!
The day after Thanksgiving isn't a day of rest for everybody. Some people need to go back to work on Friday. Some sign up to...
What is Deep Sleep? (Stage, significance, and aging)
Much has been made about the importance of getting your rapid-eye movement sleep (REM sleep), but there's another stage of...
REM sleep: What it is, why we need it
The mystery of REM sleep has challenged scientists for decades to learn why it is so distinctly different from other kinds of...
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