You need some sleep, and our bodies react to sunlight in a way that makes it easier for us to sleep when it's dark outside. But if you lived totally enclosed, like in a submarine, then you could get your sleeping done any time.
They Sleep at Night.
yes they do sleep at night
Generally they sleep at night
Chickens do sleep. They sleep at night just like humans.
How Do You Sleep at Night was created in 1998.
they sleep at night
The amount of sleep a night linked to a premature death is getting no sleep night after night.
deer do sleep at night!!
they sleep at night
Sleep.
you did not sleep enough the night before APEX :D
Night Without Sleep was created in 1952.