Sleep is very mysterious and interesting phenomenon. It has not been completely understood yet. But some certain facts have been discovered.

Sleep and Insomnia

sleepVery often we are interested in such question: why do we sleep? This question has baffled scientists for centuries. The answer for it is no one is really sure. Phenomenon of sleeping is very mysterious but some certain facts have been discovered.

We have to sleep because it is considerable to maintaining normal levels of cognitive skills such as memory, speech, flexible and innovating thinking. So sleep plays an important role in brain development.    

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