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Biology
Jamir Hansen
8 February, 05:30
Why when it's night we want to sleep
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Dixie Holland
8 February, 06:44
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Because your tired working all day doing different things and also a human needs to sleep too
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Devyn Greer
8 February, 08:27
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At night, your brain makes a chemical called melatonin that makes you sleepy.
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