R.E.M is a mentally active period of sleep.
Everyone sleeps. This fundamental activity consumes one-third of our lifetimes.
R.E.M is a mentally active period of sleep. Is marked in humans by intense activity in the brain and rapid bursts of eye movements.
Everyone sleeps. This fundamental activity consumes one-third of our lifetimes. Is marked in humans by intense activity in the brain and rapid bursts of eye movements.