Here, sleep pros answer the big question of what is sleep inertia and how you can move past the groggy feeling with six tips. Waking up can be hard, even under the best of circumstances. But sometimes ...

In a state of bewilderment one fine day, I asked a group of three mechanical engineers at this company where I was then employed if they could please explain to me the concept of “moment of inertia”.

Sleep inertia occurs when your body is fighting to stay asleep when you want it to wake up. It generally feels like a temporary disorientation and drop in performance or mood after you wake up. Here's ...