While we’re asleep at night, our brain is doing something incredible. The hippocampus and the neocortex, two of its key regions, talk back and forth, processing information for long-term ...

Nothing soothes the soul like a deep sleep. We all know the feeling: eyelids that refuse to stay open, a yawning mouth that refuses to stay closed, and a scattered mind that refuses to stay focused.

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 ...