Sleeping in a room even a little bit of light can hurt a person's health, study shows Turn out the lights for a good night of sleep: this seems like common sense, but many Americans don't actually ...

For the study, all the participants spent their first night sleeping in a mostly dark room. The next night, half of them slept in a more illuminated room (the light was placed overhead).

By Steve Gwisdalla Do you know or have you ever known a person who simply makes your soul smile? Someone who just makes the ...

Most people don't spend much time pondering the diameter of their pupils. ... and your pupils will widen to take in more light. ... such as a sunny sky or a dark room.