Daylight saving time and early school start times cost billions in lost productivity and health care expenses

Investigations into the 1986 Space Shuttle Challenger disaster revealed that key decision-makers worked on little sleep, raising concerns that fatigue impaired their judgment. Similarly, in 1989, the Exxon Valdez oil…

Can coffee or a nap make up for sleep deprivation? A psychologist explains why there’s no substitute for shut-eye

There is no denying the importance of sleep. Everyone feels better after a good night of sleep, and lack of sleep can have profoundly negative effects on both the body…