Research suggests that how often people check social media − and how emotionally engaged they are with it − can influence sleep even more than how much time they spend online.

While serotonin levels can dip and melatonin levels increase when there is less daylight (which can lead to low mood and ...

Another key psychological mechanism contributing to sleep procrastination is delay discounting; the favouring of immediate ...

REM stages and one REM stage. Ideally, you repeatedly cycle through each stage. Learn how long each stage lasts.

Is sleep tracking actually useful in daily life, or is it just data overload distracting you from what matters? After ...