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The two riverine societies that shared the most intense diplomatic interaction during the second century BCE were the Nile and the Tigris-Euphrates.
Total Sleep Time
The overall duration of sleep taken in a 24-hour period.
Dreaming
A series of thoughts, images, or emotions occurring during sleep, often associated with REM (rapid eye movement) sleep phases.
Night's Sleep
The period of rest during night time where the body and mind undergo restorative processes.
REM Sleep
A stage of sleep characterized by rapid eye movement, during which most vivid dreaming occurs, and is considered important for learning and memory processes.
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