Scientists aren’t sure why we sleep. It may be a holdover from a time when we hibernated, but that’s about it. So much about sleep makes no sense.
Lions sleep 15 hours a night and giraffes only 5 even though the giraffes are the ones running for their lives at hunting time. And, how do migrating birds, who fly for days on end, sleep?
Sleep may have evolved to maximize animal’s use of time and helps them adjust to the environment.
We humans spend a third of our lives sleeping, a fact that is called nature’s biggest mistake. But wait!
We’ve learned that sleep helps the brain to repair damage to its cells and that the memories of the day’s events are grouped together to make more sense of them.
Parents, if your child sleeps just after studying, he can recall the information more easily the next morning. Sleep is important for physical health, cognitive functioning and behavioral stability, so get enough!
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