One representation ultimately stuck, though: the letters Zzz. Its first use can be traced back to 1903 in the comic Katzenjammer Kids, created by Rudolph Dirks. In it, the snoring Captain sleeps ...
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Why Does ‘Zzz’ Mean Sleep?the letters Zzz. Its first use can be traced back to 1903 in the comic Katzenjammer Kids, created by Rudolph Dirks. In it, the snoring Captain sleeps peacefully in his hammock, emitting z’s ...
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