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Sleep is a natural state of bodily rest observed throughout the animal kingdom. It is common to all mammals and birds, and is also seen in many reptiles, amphibians and fish. http://en.wikipedia.org/wiki/SleepFrom the Simple English Wikipedia, the free encyclopedia that anyone can change http://simple.wikipedia.org/wiki/SleepFrom the Simple English Wikipedia, the free encyclopedia that anyone can change http://simple.wikipedia.org/wiki/Sleep_disorderSleep is the process in which humans periodically rest, unconscious and unaware of the surrounding world. Sleep occurs cyclically, roughly every 24 hours even though the average ... http://nostalgia.wikipedia.org/wiki/SleepDari Wikipedia Indonesia, ensiklopedia bebas berbahasa Indonesia. http://id.wikipedia.org/wiki/Sleep_apnea |
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