Human Sleep

• What is sleep?
• Why we need sleep?
• What happen in human’s body that makes us fall asleep?
• What is dream and how dream happens?
• Why we dream?
• In what stage we dream?
• How many stages are in a sleep?
• Stages of sleep?
• Sleep disorders?
• Which part is the most interesting about human sleep?
• What have you found out from sleep?
• Has scientist found everything about sleep yet? Or there are some part unfamiliar and not discovered?


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