There is plenty of evidence about how important sunlight is to our circadian rhythm, and how the blue light we stare at on computers and televisions interrupts it. Many people have poor sleep, due to ...

If our doctors had their way, we would go to sleep every day well before midnight — our phones, tablets, and TVs nowhere in sight — and we’d wake up the next morning from the sunshine streaming ...

If you're a very heavy sleeper, you already know a regular alarm clock usually doesn't get the job done, and phone alerts or easygoing sunrise alarms don't rouse those who are deep in an REM cycle, ...

Add Yahoo as a preferred source to see more of our stories on Google. alarm-clock-group-product-photo-1 Many people need to set an alarm to wake up on time in the morning. But using your phone for ...