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 ...

WASHINGTON — It’s a sound that jolts most people awake—even from some of the deepest sleep. We hit the snooze button, but the persistent, sometimes annoying, sound of our alarm clocks just won’t quit.

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, ...