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https://golovin2017.com/2016/03/29/%d0%b2%d0%be%d1%81%d1%8c%d0%bc%d0%b8%d1%87%d0%b0%d1%81%d0%be%d0%b2%d0%be%d0%b9-%d1%81%d0%be%d0%bd-%d1%81%d0%be%d0%b2%d1%80%d0%b5%d0%bc%d0%b5%d0%bd%d0%bd%d0%be%d0%b5-%d0%b8%d0%b7%d0%be%d0%b1/
Восьмичасовой сон — современное изобретение