Sleep

First liked by

brandon on March 6, 2009 at 11:30pm

Sleep is the natural state of bodily rest observed in humans and other animals. It is common to all mammals and birds, and is also seen in many reptiles, amphibians and fish. In humans, other mammals, and a substantial majority of other animals which have been studied, such as some species of fish, birds, ants and fruit-flies, regular sleep is essential for survival.

Source: http://en.wikipedia.org

Tags: dark sleep body night comfy unconcious bed pillow

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