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We spend about 8 hours/day, 56 hours/week, 240 hours/month and 2,920 hours/year doing it...that's right...SLEEPING. We apparently spend one third of our lives doing nothing. But is sleep really doing nothing? It looks like it...our eyes are closed, our muscles are relaxed, our breathing is regular, and we do not respond to sound or light. If you take a look at what is happening inside of your brain, however, you will find quite a different situation - the brain is very active. You are doing something !
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