Add Yahoo as a preferred source to see more of our stories on Google. The body's internal clock often induces people to go to bed before midnight. (Getty Image) (duncan1890 via Getty Images) There's ...

A person in dim light, reclined in bed but awake looking at a cell phone screen. Source: Cotton Bro/Pexels By the time we're old enough to have mature self-awareness, most of us know whether we are ...