Sleep happens in cycles that include three non-rapid eye movement (NREM) stages and one rapid eye movement (REM) stage, repeated 4 to 5 times nightly. Each cycle typically lasts 90 to 110 minutes. The ...

Essential Winter Driving Tips 02:34 From snow and ice to sleet and rain; winter weather doesn’t hold back. Be prepared with advice from Consumer Reports experts on how to drive through whatever winter ...