Animals have evolved to sleep in extreme ways — for example, taking micro naps during parenting, sleeping on the wing during ...

Seeking a sleep solution that doesn't involve supplements? Personalized neurostimulation from the comfort of your bed is now an option. Aly Lopez Former Writer I Aly Lopez was a writer on the sleep ...

It has been known for nearly 20 years that slow, synchronous electrical waves in the brain during deep sleep support the formation of memories. Why that is was previously unknown. Now, a team of ...

It has been known for nearly 20 years that slow, synchronous electrical waves in the brain during deep sleep support the ...

Deep sleep is one of the most essential stages of the sleep cycle, playing a vital role in how well you feel both physically and mentally. Often referred to as slow-wave sleep or delta sleep, this ...

Sign up for CNN’s Sleep, But Better newsletter series. Our seven-part guide has helpful hints to achieve better sleep. Loss of slow-wave sleep as you age may ...