sciencenewsforstudents: Screentime before bed…

sciencenewsforstudents:

Screentime before bedtime may leave people feeling groggy in the morning. Cell phones, computers and TVs emit blue light. And exposure to that bluish light during the two hours before bed can keep us from getting a good night’s rest, a new study finds.

It cut down the number of minutes people slept. It also left them feeling groggy in the morning.