Because the skull of an infant is still 'soft' so by laying them down lets say on their back all the time the infant may develop a flat back of the head. Which can be harmful to brain development and growth.
Sleep in a chair, or support your body with pillows. If you have an adjustable bed you can use that function also.
Sleeping Beauty.
A Seahorse sleeps at night. It tend to attach its tail to a rock or coral and then it will allow its body to remain in a almost horizontal position. I got very scared today, watching my seahorse sleeping under a rock. I tought for a moment he died, but he was just sleeping.
It is the ability to move or to remain in a position without losing control or falling.
An agrypnotic is a medication which prevents someone from sleeping, or causes someone to remain awake.
It is not recommended; after drying salt remain on the skin.
Latching relays have no default position and remain in their last position when the drive current stops.
aristarchus
macrophages.
ask your teachers man
Membranes can be demonstrated easily by labeling the plasma membrane proteins of not fixed in position.
A phenomenon called sleep inertia causes this. When you're sleeping a long time, the brain wants to remain asleep. A cup of coffee should do the trick.