Have you heard the saying about “sleeping with one eye open”? It’s a bit of metaphoric advice about staying vigilant—and a way to describe very light restless sleep. But sleeping with eyes open is ...
You walk over to your friend who is asleep on your couch, snoring away. You bend over to goose him when suddenly you jump back in shock. His eyes are open. Wide open ...
A recent study observed sleeping participants' pupils during sleep, using a new method that could have implications for studying sleep disorders. Reading time 2 minutes Though sleep is a time to power ...
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