While you sleep, your brain and body work all night. Fast-forward through one night and watch what happens, stage by stage.
Then find out why you get sleepy at all, and what a short night does to tomorrow.
Night Shift: Sleep: what your brain and body do all night.
Fast-forward through one night and watch the brain save the day, clean up and dream. Line up sleep pressure and your body clock, then see what short nights do to tomorrow. Grades 3 to 7.