Few of us would think twice about burning the midnight oil for the sake of productivity. But at what cost?
How much does a healthy night's sleep really matter? Take the quiz below and find out!
- Rapid eye movement (REM) is the deepest stage of sleep, when most dreaming occurs. On average, how frequently does REM occur throughout the night? a.) 4 times
b.) 3 times
c.) 2 times
d.) 1 time