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Sleep has been called temporary death, but there’s so much that goes on during that time of repose. While visiting that other world one might walk, talk, grind teeth, and sometimes dream.

Your brain is more active while you’re asleep than when watching television. And that’s even when you don’t walk or talk in sleep. No wonder our language is rife in sleep-related idioms. You can sleep in, on, out, around, with, and over. You can lose sleep over things.

You can go without food for a while but you can’t cheat on sleep. It demands its dues. According to a report, you would be 25% less alert on just an hour’s loss of sleep.

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–  wordsmith.org