MANILA, Philippines — Did you know that one of the four stages of sleep helps regulate emotions, and if it is not achieved through it, it could be the reason why you wake up cranky? It has been said ...

REM stands for rapid eye movement — a stage in the sleep cycle when your brain is almost as active as when you’re awake. Getting enough REM sleep is crucial, as it helps you store information and ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. In the past, scientists ...